President and General Counsel, New Civil Liberties Alliance
NCLA’s President and General Counsel, Mark Chenoweth, has observed the administrative state up close and personal from perches in all four branches of the federal government. Mark served as the first chief of staff to Congressman Mike Pompeo, as legal counsel to Commissioner Anne Northup at the U.S. Consumer Product Safety Commission, as an attorney advisor in the Office of Legal Policy at the U.S. Department of Justice, and as a law clerk to the Hon. Danny J. Boggs on the U.S. Court of Appeals for the Sixth Circuit.
Mark has worked in several different roles in the private sector as well. He began his legal career in D.C. as a regulatory associate at Wilmer, Cutler & Pickering. He then returned to his home state of Kansas to serve as in-house counsel for Koch Industries. Most recently he spent over four years as general counsel of the Washington Legal Foundation.
Mark is a graduate of Yale College and the University of Chicago Law School, where he co-founded the Institute for Justice Clinic on Entrepreneurship and became a Tony Patiño Fellow. Mark has been widely quoted and/or published in newspapers and websites including the New York Times, San Francisco Chronicle, New Hampshire Union Leader, and Metropolitan Corporate Counsel. He has also had recurring op-eds in the Los Angeles Daily Journal, and at Forbes.com.
Director, Climate & Clean Air Program, Natural Resources Defense Council
David Doniger has been at the forefront of the battle against air pollution and global climate change since he joined NRDC in 1978. He helped formulate the Montreal Protocol, an international agreement designed to stop the depletion of the earth's ozone layer, as well as several essential amendments to the Clean Air Act. In 1993, he left NRDC to serve on the White House Council on Environmental Quality, followed by key posts at the U.S. Environmental Protection Agency. He rejoined NRDC in 2001 and has since been working to defend the Clean Air Act from assaults in Congress. He is based in Washington, D.C.
Associate Dean for Research and Intellectual Life, McKnight Presidential Professor in Law, Distinguished McKnight University Professor, Harlan Albert Rogers Professor in Law, Associate Director, Corporate Institute, University of Minnesota Law School
Professor Kristin E. Hickman is the McKnight Presidential Professor in Law, a Distinguished McKnight University Professor, and Harlan Albert Rogers Professor in Law at the University of Minnesota Law School. She also has taught at Harvard Law School and Northwestern University School of Law. Professor Hickman teaches and writes primarily in the areas of administrative law, tax administration, and statutory interpretation. Her articles on these topics have appeared in the Columbia Law Review, Cornell Law Review, Virginia Law Review, Duke Law Journal, and other publications. She also co-authors the Administrative Law Treatise with Richard J. Pierce, Jr., and a casebook on federal administrative law with Pierce and Christopher J. Walker. Her scholarly work has been cited several times in opinions of the United States Supreme Court as well as regularly in lower court judicial opinions and court briefs.
In 2018-19, Professor Hickman served as Special Adviser to the Administrator of the Office of Information and Regulatory Affairs in Washington, D.C. She presently serves as a Senior Fellow, and previously served as a public member and chair of the judicial review committee, for the Administrative Conference of the United States. She also is a Fellow of the American College of Tax Counsel.
Professor Hickman received her B.S. degree in business administration with a concentration in accounting and a secondary major in history from Trinity University in San Antonio, Texas. After practicing for several years as a certified public accountant, Professor Hickman earned her J.D. degree, magna cum laude, from Northwestern University School of Law, where she was awarded the Raoul Berger Prize and the Lowden Wigmore Prize for her scholarly writings. Following law school, Professor Hickman clerked for The Honorable David B. Sentelle of the United States Court of Appeals for the District of Columbia Circuit and practiced law as an associate with the Chicago office of Skadden, Arps, Slate, Meagher & Flom, concentrating on corporate and international tax transactions and matters.
Judge, U.S. Court of Appeals for the Third Circuit
Hon. Jennifer Mascott served as Associate Professor of Law and Director of the Separation of Powers Institute at The Catholic University of America’s Columbus School of Law before her appointment to the federal bench. On July 16, 2025, President Donald J. Trump nominated her to the U.S. Court of Appeals for the Third Circuit (Delaware), and she was confirmed on October 9, 2025.
Prior to her confirmation, Judge Mascott wrote extensively in administrative and constitutional law, statutory interpretation, and the separation of powers. Her scholarship—published in leading journals including the Stanford Law Review, Notre Dame Law Review, and Supreme Court Review—was cited by the U.S. Supreme Court and multiple federal courts. She also contributed Supreme Court commentary for NBC Universal.
Before joining Catholic Law, she was an Assistant Professor and Co-Director of The C. Boyden Gray Center at George Mason University’s Antonin Scalia Law School. In 2022 she became co-author of Beermann, Cass & Diver’s Administrative Law: Cases and Materials (9th ed.). In 2023 she received the Justice Joseph Story Award for excellence in scholarship, teaching, and advancing the rule of law.
Judge Mascott also served as a Council Member of the ABA’s Administrative Law Section and as a Public Member of the Administrative Conference of the United States. She frequently testified before Congress on executive power, regulatory reform, and judicial jurisdiction, and participated in multiple Supreme Court confirmation hearings.
From 2019 to 2021, she took leave from academia to serve as Deputy Assistant Attorney General in the Department of Justice’s Office of Legal Counsel and later as Associate Deputy Attorney General, where she argued federal cases and assisted with Justice Amy Coney Barrett’s confirmation. Earlier in her career, she clerked for Justice Clarence Thomas and for then-Judge Brett M. Kavanaugh on the D.C. Circuit.
Judge Mascott earned her J.D. summa cum laude from the George Washington University Law School and her B.A. from the same institution.
Associate, Wiley Rein LLP
Joel S. Nolette is an associate at Wiley Rein LLP, where he advocates on behalf of corporate and individual clients in a broad spectrum of complex litigation matters. In 2017, Joel graduated cum laude from the Georgetown University Law Center, where he served as the Editor in Chief of Volume 15 of the Georgetown Journal of Law and Public Policy. From 2019 to 2021, Joel clerked for the Honorable Raymond W. Gruender of the U.S. Court of Appeals for the Eighth Circuit; and from 2021 to 2022, he clerked for the Honorable Timothy J. Kelly of the U.S. District Court for the District of Columbia. Before attending law school, Joel graduated summa cum laude from Gordon College in Wenham, MA, with his Bachelor of Arts in Biblical Studies and worked as a letter carrier with the U.S. Postal Service.
Trustee Professor of Law, New York Law School
From 1972-79, Schoenbrod served as one of the leaders of the Natural Resources Defense Council, where he campaigned to reduce lead in gasoline, resurrect the then-decrepit New York City subway, and protect the environment of Puerto Rico. Previously, he was Director of Program Development at the community development project that Senator Robert Kennedy established in Bedford Stuyvesant. He has also been a senior fellow at the Cato Institute and the American Enterprise Institute.
His books include
D.C. Confidential: Inside the Five Tricks of Washington (Encounter Books, 2017) with forewords by Governor Howard Dean and Senator Mike Lee;
Breaking the Logjam: Environmental Protection That Will Work (Yale University Press, 2010)(with Richard B. Stewart and Katrina M. Wyman);
Saving Our Environment from Washington: How Congress Grabs Power, Shirks Responsibility, and Shortchanges the People (Yale University Press, 2005);
Democracy by Decree: What Happens When Courts Run Government (Yale University Press, 2003) (with Ross Sandler); and
Power Without Responsibility: How Congress Abuses the People Through Delegation (Yale University Press, 1993).
In addition to writing scholarly articles, he has frequently contributed opinion pieces to the Wall Street Journal, The Hill, the New York Times, and other publications.
He has an undergraduate degree from Yale College, a graduate degree in economics from Oxford University, which he attended as a Marshall Scholar, and a law degree from Yale Law School.
Senior Counsel for Environmental and Regulatory Affairs, Boeing
Adam Gustafson is a Senior Counsel for Environmental and Regulatory Affairs at Boeing.
Prior to joining Boeing, he served as Deputy General Counsel at the Environmental Protection Agency. Prior to that, he was a partner at Boyden Gray & Associates, where he represented States, federal judges, environmental groups, biofuel producers, agricultural interests, and public policy organizations, on such issues as the constitutional separation of powers, the First Amendment, automotive regulations, environmental computer models, healthcare regulation, and judicial deference to federal agencies.
Mr. Gustafson received his J.D. in 2009 from Yale Law School, where he was an editor of the Yale Law Journal, a managing editor of the Yale Journal of Law & the Humanities, and an executive editor of the symposium issue of the Harvard Journal of Law & Public Policy.
Mr. Gustafson served as a Vice President of the Yale Law School Federalist Society. He was a Coker Fellow, and his legal writing won the Joseph A. Chubb Competition Prize and the Edward D. Robbins Memorial Prize.
Mr. Gustafson graduated with high distinction in 2005 from the University of Virginia, where he was an Echols Scholar, a member of the Raven Society, a member of the rowing team, and a Lawn resident.
Before joining Boyden Gray & Associates, Mr. Gustafson was an associate at Cooper & Kirk, where he specialized in appellate litigation. Mr. Gustafson served as a law clerk to Judge Richard R. Clifton of the U.S. Court of Appeals for the Ninth Circuit, and to Judge Janice Rogers Brown of the U.S. Court of Appeals for the D.C. Circuit.
Partner, Bracewell LLP
Jeffrey Holmstead, former assistant administrator of the United States Environmental Protection Agency for Air and Radiation, is one of the nation’s leading climate change lawyers as recognized by Chambers USA (2008-2016) and heads the environmental strategies group (ESG) at Bracewell. The ESG is a multi-disciplinary group that includes environmental and energy attorneys, public policy advocates and strategic communications experts – most of whom have had high-level government experience. Under Jeffrey’s leadership, they work together on a daily basis to advise and defend companies and business groups confronting major environmental and energy-development challenges, both domestically and globally.
From his time in both the government and the private sector, Jeffrey is very familiar with the environmental and energy challenges facing the business community. He advises clients dealing with an increasingly complex regulatory, legal and public relations landscape, drawing on his experience in policy development, administrative and legislative advocacy, litigation and strategic communications. He has worked with clients in a number of industries on issues related to climate change, Clean Air Act policy and enforcement, and energy policy — including the development of new coal-fired power plants, refineries, renewable energy sources, and electric transmission infrastructure.
Jeffrey headed the EPA’s Office of Air and Radiation from 2001 to 2005, longer than anyone in EPA history. During his tenure, he was the architect of several of the agency’s most important initiatives, including the Clean Air Interstate Rule, the Clean Air Diesel Rule, the Mercury Rule for power plants and the reform of the New Source Review program. He also oversaw the development of the Bush Administration’s Clear Skies Legislation and key parts of its Global Climate Change Initiative. Between 1989 and 1993, Jeffrey served on the White House Staff as Associate Counsel to former President George H.W. Bush. In that capacity, he was involved in the passage of the Clean Air Act Amendments of 1990 and the key steps taken to implement those amendments. From 1987 to 1988, he served as a law clerk to Judge Douglas H. Ginsburg on the U.S. Court of Appeals for the District of Columbia.
He received his B.A. from Brigham Young University, summa cum laude, and his J.D. from Yale Law School.
Director, Clean Air Project, Climate & Clean Air Program, Natural Resources Defense Council
John Walke has spearheaded the NRDC’s national clean-air advocacy before Congress, in the courts, at the U.S. Environmental Protection Agency, and before the public since 2000. Before joining NRDC, he spent three years working as an attorney in the EPA’s Office of General Counsel, where he handled cases related to permitting, air toxins, monitoring, and enforcement under the Clean Air Act. Prior to that, he was an associate in a private law firm based in Washington, D.C. Walke is a graduate of Duke University and Harvard Law School. He is based in Washington, D.C.
Director, Climate & Clean Air Program, Natural Resources Defense Council
David Doniger has been at the forefront of the battle against air pollution and global climate change since he joined NRDC in 1978. He helped formulate the Montreal Protocol, an international agreement designed to stop the depletion of the earth's ozone layer, as well as several essential amendments to the Clean Air Act. In 1993, he left NRDC to serve on the White House Council on Environmental Quality, followed by key posts at the U.S. Environmental Protection Agency. He rejoined NRDC in 2001 and has since been working to defend the Clean Air Act from assaults in Congress. He is based in Washington, D.C.
Partner, Crowell & Moring
Mr. Lorenzen is a partner in Crowell & Moring's Washington, D.C. office and is a member of the Environment & Natural Resources and Government Affairs groups. He works with clients seeking to successfully navigate the federal environmental rulemaking process.
With a decade of Justice Department experience managing the legal defense of all EPA rules, Mr. Lorenzen has a unique ability to help clients shape environmental policy, provide vital input on proposed federal environmental regulations through written comment and direct interaction with regulators, and mount effective judicial challenges to EPA actions that adversely affect his clients' interests. He also helps clients ensure compliance with existing environmental regulations. In addition, he is a noted appellate lawyer who has briefed, argued, or supervised hundreds of petitions for review of EPA regulations and other final EPA actions.
While he was at the Department of Justice, Mr. Lorenzen oversaw many of the seminal environmental cases of the last decade. These include Massachusetts v. EPA, in which the Supreme Court affirmed EPA's authority to regulate greenhouse gases under the Clean Air Act, and Entergy v. Riverkeeper, in which the Court held that EPA has discretion under the Clean Water Act to consider or decline to consider costs in determining how to regulate cooling water intake structures. In the D.C. Circuit and the other federal courts of appeals, he oversaw the government's defense in Coalition for Responsible Regulation v. EPA, in which the court upheld EPA's first suite of greenhouse gas regulations (largely upheld by the Supreme Court in Utility Air Regulatory Group v. EPA); EME Homer City Generation, L.P. v. EPA and North Carolina v. EPA, in which the court reviewed EPA's various attempts to address interstate transport of air pollutants; numerous cases challenging EPA regulations governing emissions of hazardous air pollutants; and National Cotton Council v. EPA, in which the Sixth Circuit reviewed EPA's Clean Water Act regulations governing the application of pesticides over waters of the United States.
Mr. Lorenzen is a frequent lecturer and commentator in print, on the internet, and on television regarding federal environmental law, climate change regulation, administrative law, federal policymaking, and effective appellate brief-writing and argument.
Director of Law & Policy, Environmental Integrity Project
Following Princeton and the University of Chicago Law School, David began practicing law at Paul, Weiss, Rifkind, Wharton & Garrison. Eventually tiring of litigation where the result was a wire transfer from Entity A to Entity B, in the early 1990’s David began his environmental law career at the Massachusetts Attorney General’s Office. Since then, he has litigated dozens of cases under all of the major environmental statutes including, as Sierra Club’s Chief Climate Counsel, initiating and managing Massachusetts v. EPA. Most recently, he has been busy challenging FERC’s permitting of natural gas pipelines and LNG export terminals. Apart from litigation, David has helped lead efforts on both greenhouse gas regulation and global warming legislation (and may be the only person ever invited to testify by both Barbara Boxer and James Inhofe).
He has drafted a range of federal climate legislation, advised states as to their greenhouse gas regulatory authority (and for many years has represented environmental groups defending state GHG regulations from dormant Commerce Clause challenges). David has designed and taught courses on “Environmental Litigation” at Georgetown University Law Center and “Environmental Law and Science” at the William and Mary Law School/Virginia Institute of Marine Science.
Director, Climate & Clean Air Program, Natural Resources Defense Council
David Doniger has been at the forefront of the battle against air pollution and global climate change since he joined NRDC in 1978. He helped formulate the Montreal Protocol, an international agreement designed to stop the depletion of the earth's ozone layer, as well as several essential amendments to the Clean Air Act. In 1993, he left NRDC to serve on the White House Council on Environmental Quality, followed by key posts at the U.S. Environmental Protection Agency. He rejoined NRDC in 2001 and has since been working to defend the Clean Air Act from assaults in Congress. He is based in Washington, D.C.
Former Administrator, U.S. Environmental Protection Agency
Scott Pruitt served as the 14th Administrator of the U.S. Environmental Protection Agency.
As Administrator, Mr. Pruitt’s overarching goal was to lead EPA in a way that our future generations inherit a better and healthier environment as he works with the thousands of dedicated public servants at EPA who have devoted their careers to helping realize this shared vision, while faithfully administering environmental laws.
Prior to the EPA, Pruitt served as the Attorney General for Oklahoma. Almost immediately upon taking office, he worked with his Democratic counterpart in Arkansas to reach agreement to study the water quality of the Illinois River, which crosses the border between the two states and has been enjoyed by generations of Oklahomans. The Statement of Joint Principles provides for a best science study using EPA-approved methods, with both states agreeing, for the first time, to be bound by the outcome.
Also during his tenure as Oklahoma’s Attorney General, Pruitt led an historic water rights settlement between Oklahoma, Oklahoma City and the Choctaw and Chickasaw Tribal Nations that preserved the ecosystems of scenic lakes and rivers on native lands. The agreement, which required Congressional approval, was enacted into Section 3608 of Public Law 114-322 and signed in December 2016. It provides a framework that fosters intergovernmental collaboration on significant water resource concerns with the settlement area, while at the same time protecting existing water rights and affirming the state’s role in water rights permitting and administration.
Water settlement cases can be lengthy, costly, divisive and disruptive; however under Pruitt’s forward-thinking leadership, the process was hailed by all parties as one of commitment, hard work, perseverance and cooperation.
Pruitt became a national leader through a career of advocating to keep power in the hands of hard-working Americans. He has a proven track record of working with others – including industry, farmers, ranchers, landowners and small business owners - who want to do the right thing by the environment.
He has dedicated his career to creating policy that serves the people. He strongly believes that environmental law, policy and progress are all based on cooperation between the states, cooperation between the states and EPA, and cooperation between regulators and the public. As Attorney General for Oklahoma, he led the state’s legal challenges against property rights intrusion, while protecting Oklahoma’s natural resources and environment.
He is recognized as a national leader in the cause to restore the proper balance between the states and federal government, and he established Oklahoma’s first federalism unit to combat unwarranted regulation and overreach by the federal government.
Before being elected attorney general, he served eight years in the Oklahoma State Senate where he was a leading voice for fiscal responsibility.
After earning his Bachelor’s Degree from Georgetown College and graduating from the University of Tulsa College of Law, Pruitt went into private legal practice, specializing in constitutional law.
In addition to his life as a civil servant, Pruitt is a successful entrepreneur. As a co-owner and managing general partner of Oklahoma City’s Triple-A minor league baseball affiliate, the Oklahoma City Redhawks, Mr. Pruitt took over the team’s marketing operations and helped the team become one of the minor league leaders in attendance and merchandise sales.
Pruitt is, first and foremost, a family man. He and Marlyn, his wife of 27 years, proudly raised their daughter, McKenna, and son, Cade, in Tulsa. Pruitt has made it a priority to pass on to his children the same principled family values with which he was raised.
Partner, Baker Hostetler LLP
David Rivkin is a member of the firm's litigation, international and environmental teams and is co-leader of the firm's national appellate practice. He has extensive experience in constitutional, administrative and international law litigation and has been involved in numerous high-profile cases. With his prior experience in the government sector, David draws on a wealth of knowledge when providing compliance advice to companies and handling enforcement proceedings before government agencies on issues arising out of multilateral and unilateral sanctions, the Foreign Corrupt Practices Act (FCPA), anti-boycott issues, bankruptcy and financial fraud matters, and environmental and energy issues.
David has developed and implemented legislative, regulatory and litigation initiatives for two presidential administrations. Over the years, he has published hundreds of articles, op-eds, book reviews and book chapters on a variety of international, legal, constitutional, defense, arms control, foreign policy, environmental and energy issues for various newspapers and magazines, including The Wall Street Journal, The Washington Post, The New York Times, USA Today and The Los Angeles Times, and has been a frequent commentator and guest on TV and radio shows including ABC, CBS, NBC, CNN, Fox News, NPR and PBS.
Laurence H. Silberman Chair in Constitutional Governance and Senior Fellow, American Enterprise Institute; Co-Director, Antonin Scalia Law School’s C. Boyden Gray Center for the Study of the Administrative State
Adam J. White is the Laurence H. Silberman Chair in Constitutional Governance and senior fellow at the American Enterprise Institute, where he focuses on the Supreme Court and the administrative state. Concurrently, he codirects the Antonin Scalia Law School’s C. Boyden Gray Center for the Study of the Administrative State.
Mr. White practiced constitutional and administrative law, particularly in the regulation of energy and financial markets. He started his legal career as a law clerk for Judge David B. Sentelle at the US Court of Appeals for the DC Circuit.
Mr. White has written for the Wall Street Journal, the New York Times, the Washington Post, National Affairs, Commentary, Harvard Journal of Law & Public Policy, and Notre Dame Law Review, among other publications. He is a regular contributor to the Yale Journal on Regulation’s Notice and Comment blog, and for many years, he was one of the Weekly Standard’s lead writers on constitutional law and the Supreme Court.
Mr. White has testified often before Congress, including before the Senate’s Committees on the Judiciary; Commerce, Science, and Transportation; and Homeland Security and Governmental Affairs and before the House’s Judiciary and Financial Services Committees. In 2018, the Senate Committee on the Judiciary called him to testify in Brett Kavanaugh’s Supreme Court confirmation hearings to advise senators on Kavanaugh’s approach to administrative law.
In 2021, he served on the Presidential Commission on the Supreme Court of the United States, where he criticized “Court packing” and other efforts to restructure the Supreme Court. In 2017, he was appointed to serve on the Administrative Conference of the United States. He also serves on the leadership council for the American Bar Association’s Administrative Law and Regulatory Practice Section, which he will chair in 2023–24. Before joining AEI, he was a research fellow at Stanford University’s Hoover Institution and an adjunct fellow at the Manhattan Institute.
Mr. White has a JD from Harvard Law School and a bachelor of business administration from the College of Business at the University of Iowa.
Senior Counsel for Environmental and Regulatory Affairs, Boeing
Adam Gustafson is a Senior Counsel for Environmental and Regulatory Affairs at Boeing.
Prior to joining Boeing, he served as Deputy General Counsel at the Environmental Protection Agency. Prior to that, he was a partner at Boyden Gray & Associates, where he represented States, federal judges, environmental groups, biofuel producers, agricultural interests, and public policy organizations, on such issues as the constitutional separation of powers, the First Amendment, automotive regulations, environmental computer models, healthcare regulation, and judicial deference to federal agencies.
Mr. Gustafson received his J.D. in 2009 from Yale Law School, where he was an editor of the Yale Law Journal, a managing editor of the Yale Journal of Law & the Humanities, and an executive editor of the symposium issue of the Harvard Journal of Law & Public Policy.
Mr. Gustafson served as a Vice President of the Yale Law School Federalist Society. He was a Coker Fellow, and his legal writing won the Joseph A. Chubb Competition Prize and the Edward D. Robbins Memorial Prize.
Mr. Gustafson graduated with high distinction in 2005 from the University of Virginia, where he was an Echols Scholar, a member of the Raven Society, a member of the rowing team, and a Lawn resident.
Before joining Boyden Gray & Associates, Mr. Gustafson was an associate at Cooper & Kirk, where he specialized in appellate litigation. Mr. Gustafson served as a law clerk to Judge Richard R. Clifton of the U.S. Court of Appeals for the Ninth Circuit, and to Judge Janice Rogers Brown of the U.S. Court of Appeals for the D.C. Circuit.
Partner, Bracewell LLP
Jeffrey Holmstead, former assistant administrator of the United States Environmental Protection Agency for Air and Radiation, is one of the nation’s leading climate change lawyers as recognized by Chambers USA (2008-2016) and heads the environmental strategies group (ESG) at Bracewell. The ESG is a multi-disciplinary group that includes environmental and energy attorneys, public policy advocates and strategic communications experts – most of whom have had high-level government experience. Under Jeffrey’s leadership, they work together on a daily basis to advise and defend companies and business groups confronting major environmental and energy-development challenges, both domestically and globally.
From his time in both the government and the private sector, Jeffrey is very familiar with the environmental and energy challenges facing the business community. He advises clients dealing with an increasingly complex regulatory, legal and public relations landscape, drawing on his experience in policy development, administrative and legislative advocacy, litigation and strategic communications. He has worked with clients in a number of industries on issues related to climate change, Clean Air Act policy and enforcement, and energy policy — including the development of new coal-fired power plants, refineries, renewable energy sources, and electric transmission infrastructure.
Jeffrey headed the EPA’s Office of Air and Radiation from 2001 to 2005, longer than anyone in EPA history. During his tenure, he was the architect of several of the agency’s most important initiatives, including the Clean Air Interstate Rule, the Clean Air Diesel Rule, the Mercury Rule for power plants and the reform of the New Source Review program. He also oversaw the development of the Bush Administration’s Clear Skies Legislation and key parts of its Global Climate Change Initiative. Between 1989 and 1993, Jeffrey served on the White House Staff as Associate Counsel to former President George H.W. Bush. In that capacity, he was involved in the passage of the Clean Air Act Amendments of 1990 and the key steps taken to implement those amendments. From 1987 to 1988, he served as a law clerk to Judge Douglas H. Ginsburg on the U.S. Court of Appeals for the District of Columbia.
He received his B.A. from Brigham Young University, summa cum laude, and his J.D. from Yale Law School.
Director, Clean Air Project, Climate & Clean Air Program, Natural Resources Defense Council
John Walke has spearheaded the NRDC’s national clean-air advocacy before Congress, in the courts, at the U.S. Environmental Protection Agency, and before the public since 2000. Before joining NRDC, he spent three years working as an attorney in the EPA’s Office of General Counsel, where he handled cases related to permitting, air toxins, monitoring, and enforcement under the Clean Air Act. Prior to that, he was an associate in a private law firm based in Washington, D.C. Walke is a graduate of Duke University and Harvard Law School. He is based in Washington, D.C.
Director, Climate & Clean Air Program, Natural Resources Defense Council
David Doniger has been at the forefront of the battle against air pollution and global climate change since he joined NRDC in 1978. He helped formulate the Montreal Protocol, an international agreement designed to stop the depletion of the earth's ozone layer, as well as several essential amendments to the Clean Air Act. In 1993, he left NRDC to serve on the White House Council on Environmental Quality, followed by key posts at the U.S. Environmental Protection Agency. He rejoined NRDC in 2001 and has since been working to defend the Clean Air Act from assaults in Congress. He is based in Washington, D.C.
Partner, Crowell & Moring
Mr. Lorenzen is a partner in Crowell & Moring's Washington, D.C. office and is a member of the Environment & Natural Resources and Government Affairs groups. He works with clients seeking to successfully navigate the federal environmental rulemaking process.
With a decade of Justice Department experience managing the legal defense of all EPA rules, Mr. Lorenzen has a unique ability to help clients shape environmental policy, provide vital input on proposed federal environmental regulations through written comment and direct interaction with regulators, and mount effective judicial challenges to EPA actions that adversely affect his clients' interests. He also helps clients ensure compliance with existing environmental regulations. In addition, he is a noted appellate lawyer who has briefed, argued, or supervised hundreds of petitions for review of EPA regulations and other final EPA actions.
While he was at the Department of Justice, Mr. Lorenzen oversaw many of the seminal environmental cases of the last decade. These include Massachusetts v. EPA, in which the Supreme Court affirmed EPA's authority to regulate greenhouse gases under the Clean Air Act, and Entergy v. Riverkeeper, in which the Court held that EPA has discretion under the Clean Water Act to consider or decline to consider costs in determining how to regulate cooling water intake structures. In the D.C. Circuit and the other federal courts of appeals, he oversaw the government's defense in Coalition for Responsible Regulation v. EPA, in which the court upheld EPA's first suite of greenhouse gas regulations (largely upheld by the Supreme Court in Utility Air Regulatory Group v. EPA); EME Homer City Generation, L.P. v. EPA and North Carolina v. EPA, in which the court reviewed EPA's various attempts to address interstate transport of air pollutants; numerous cases challenging EPA regulations governing emissions of hazardous air pollutants; and National Cotton Council v. EPA, in which the Sixth Circuit reviewed EPA's Clean Water Act regulations governing the application of pesticides over waters of the United States.
Mr. Lorenzen is a frequent lecturer and commentator in print, on the internet, and on television regarding federal environmental law, climate change regulation, administrative law, federal policymaking, and effective appellate brief-writing and argument.
Director of Law & Policy, Environmental Integrity Project
Following Princeton and the University of Chicago Law School, David began practicing law at Paul, Weiss, Rifkind, Wharton & Garrison. Eventually tiring of litigation where the result was a wire transfer from Entity A to Entity B, in the early 1990’s David began his environmental law career at the Massachusetts Attorney General’s Office. Since then, he has litigated dozens of cases under all of the major environmental statutes including, as Sierra Club’s Chief Climate Counsel, initiating and managing Massachusetts v. EPA. Most recently, he has been busy challenging FERC’s permitting of natural gas pipelines and LNG export terminals. Apart from litigation, David has helped lead efforts on both greenhouse gas regulation and global warming legislation (and may be the only person ever invited to testify by both Barbara Boxer and James Inhofe).
He has drafted a range of federal climate legislation, advised states as to their greenhouse gas regulatory authority (and for many years has represented environmental groups defending state GHG regulations from dormant Commerce Clause challenges). David has designed and taught courses on “Environmental Litigation” at Georgetown University Law Center and “Environmental Law and Science” at the William and Mary Law School/Virginia Institute of Marine Science.
Director, Climate & Clean Air Program, Natural Resources Defense Council
David Doniger has been at the forefront of the battle against air pollution and global climate change since he joined NRDC in 1978. He helped formulate the Montreal Protocol, an international agreement designed to stop the depletion of the earth's ozone layer, as well as several essential amendments to the Clean Air Act. In 1993, he left NRDC to serve on the White House Council on Environmental Quality, followed by key posts at the U.S. Environmental Protection Agency. He rejoined NRDC in 2001 and has since been working to defend the Clean Air Act from assaults in Congress. He is based in Washington, D.C.
Former Administrator, U.S. Environmental Protection Agency
Scott Pruitt served as the 14th Administrator of the U.S. Environmental Protection Agency.
As Administrator, Mr. Pruitt’s overarching goal was to lead EPA in a way that our future generations inherit a better and healthier environment as he works with the thousands of dedicated public servants at EPA who have devoted their careers to helping realize this shared vision, while faithfully administering environmental laws.
Prior to the EPA, Pruitt served as the Attorney General for Oklahoma. Almost immediately upon taking office, he worked with his Democratic counterpart in Arkansas to reach agreement to study the water quality of the Illinois River, which crosses the border between the two states and has been enjoyed by generations of Oklahomans. The Statement of Joint Principles provides for a best science study using EPA-approved methods, with both states agreeing, for the first time, to be bound by the outcome.
Also during his tenure as Oklahoma’s Attorney General, Pruitt led an historic water rights settlement between Oklahoma, Oklahoma City and the Choctaw and Chickasaw Tribal Nations that preserved the ecosystems of scenic lakes and rivers on native lands. The agreement, which required Congressional approval, was enacted into Section 3608 of Public Law 114-322 and signed in December 2016. It provides a framework that fosters intergovernmental collaboration on significant water resource concerns with the settlement area, while at the same time protecting existing water rights and affirming the state’s role in water rights permitting and administration.
Water settlement cases can be lengthy, costly, divisive and disruptive; however under Pruitt’s forward-thinking leadership, the process was hailed by all parties as one of commitment, hard work, perseverance and cooperation.
Pruitt became a national leader through a career of advocating to keep power in the hands of hard-working Americans. He has a proven track record of working with others – including industry, farmers, ranchers, landowners and small business owners - who want to do the right thing by the environment.
He has dedicated his career to creating policy that serves the people. He strongly believes that environmental law, policy and progress are all based on cooperation between the states, cooperation between the states and EPA, and cooperation between regulators and the public. As Attorney General for Oklahoma, he led the state’s legal challenges against property rights intrusion, while protecting Oklahoma’s natural resources and environment.
He is recognized as a national leader in the cause to restore the proper balance between the states and federal government, and he established Oklahoma’s first federalism unit to combat unwarranted regulation and overreach by the federal government.
Before being elected attorney general, he served eight years in the Oklahoma State Senate where he was a leading voice for fiscal responsibility.
After earning his Bachelor’s Degree from Georgetown College and graduating from the University of Tulsa College of Law, Pruitt went into private legal practice, specializing in constitutional law.
In addition to his life as a civil servant, Pruitt is a successful entrepreneur. As a co-owner and managing general partner of Oklahoma City’s Triple-A minor league baseball affiliate, the Oklahoma City Redhawks, Mr. Pruitt took over the team’s marketing operations and helped the team become one of the minor league leaders in attendance and merchandise sales.
Pruitt is, first and foremost, a family man. He and Marlyn, his wife of 27 years, proudly raised their daughter, McKenna, and son, Cade, in Tulsa. Pruitt has made it a priority to pass on to his children the same principled family values with which he was raised.
Partner, Baker Hostetler LLP
David Rivkin is a member of the firm's litigation, international and environmental teams and is co-leader of the firm's national appellate practice. He has extensive experience in constitutional, administrative and international law litigation and has been involved in numerous high-profile cases. With his prior experience in the government sector, David draws on a wealth of knowledge when providing compliance advice to companies and handling enforcement proceedings before government agencies on issues arising out of multilateral and unilateral sanctions, the Foreign Corrupt Practices Act (FCPA), anti-boycott issues, bankruptcy and financial fraud matters, and environmental and energy issues.
David has developed and implemented legislative, regulatory and litigation initiatives for two presidential administrations. Over the years, he has published hundreds of articles, op-eds, book reviews and book chapters on a variety of international, legal, constitutional, defense, arms control, foreign policy, environmental and energy issues for various newspapers and magazines, including The Wall Street Journal, The Washington Post, The New York Times, USA Today and The Los Angeles Times, and has been a frequent commentator and guest on TV and radio shows including ABC, CBS, NBC, CNN, Fox News, NPR and PBS.
Laurence H. Silberman Chair in Constitutional Governance and Senior Fellow, American Enterprise Institute; Co-Director, Antonin Scalia Law School’s C. Boyden Gray Center for the Study of the Administrative State
Adam J. White is the Laurence H. Silberman Chair in Constitutional Governance and senior fellow at the American Enterprise Institute, where he focuses on the Supreme Court and the administrative state. Concurrently, he codirects the Antonin Scalia Law School’s C. Boyden Gray Center for the Study of the Administrative State.
Mr. White practiced constitutional and administrative law, particularly in the regulation of energy and financial markets. He started his legal career as a law clerk for Judge David B. Sentelle at the US Court of Appeals for the DC Circuit.
Mr. White has written for the Wall Street Journal, the New York Times, the Washington Post, National Affairs, Commentary, Harvard Journal of Law & Public Policy, and Notre Dame Law Review, among other publications. He is a regular contributor to the Yale Journal on Regulation’s Notice and Comment blog, and for many years, he was one of the Weekly Standard’s lead writers on constitutional law and the Supreme Court.
Mr. White has testified often before Congress, including before the Senate’s Committees on the Judiciary; Commerce, Science, and Transportation; and Homeland Security and Governmental Affairs and before the House’s Judiciary and Financial Services Committees. In 2018, the Senate Committee on the Judiciary called him to testify in Brett Kavanaugh’s Supreme Court confirmation hearings to advise senators on Kavanaugh’s approach to administrative law.
In 2021, he served on the Presidential Commission on the Supreme Court of the United States, where he criticized “Court packing” and other efforts to restructure the Supreme Court. In 2017, he was appointed to serve on the Administrative Conference of the United States. He also serves on the leadership council for the American Bar Association’s Administrative Law and Regulatory Practice Section, which he will chair in 2023–24. Before joining AEI, he was a research fellow at Stanford University’s Hoover Institution and an adjunct fellow at the Manhattan Institute.
Mr. White has a JD from Harvard Law School and a bachelor of business administration from the College of Business at the University of Iowa.
Director of Law & Policy, Environmental Integrity Project
Following Princeton and the University of Chicago Law School, David began practicing law at Paul, Weiss, Rifkind, Wharton & Garrison. Eventually tiring of litigation where the result was a wire transfer from Entity A to Entity B, in the early 1990’s David began his environmental law career at the Massachusetts Attorney General’s Office. Since then, he has litigated dozens of cases under all of the major environmental statutes including, as Sierra Club’s Chief Climate Counsel, initiating and managing Massachusetts v. EPA. Most recently, he has been busy challenging FERC’s permitting of natural gas pipelines and LNG export terminals. Apart from litigation, David has helped lead efforts on both greenhouse gas regulation and global warming legislation (and may be the only person ever invited to testify by both Barbara Boxer and James Inhofe).
He has drafted a range of federal climate legislation, advised states as to their greenhouse gas regulatory authority (and for many years has represented environmental groups defending state GHG regulations from dormant Commerce Clause challenges). David has designed and taught courses on “Environmental Litigation” at Georgetown University Law Center and “Environmental Law and Science” at the William and Mary Law School/Virginia Institute of Marine Science.
Director, Climate & Clean Air Program, Natural Resources Defense Council
David Doniger has been at the forefront of the battle against air pollution and global climate change since he joined NRDC in 1978. He helped formulate the Montreal Protocol, an international agreement designed to stop the depletion of the earth's ozone layer, as well as several essential amendments to the Clean Air Act. In 1993, he left NRDC to serve on the White House Council on Environmental Quality, followed by key posts at the U.S. Environmental Protection Agency. He rejoined NRDC in 2001 and has since been working to defend the Clean Air Act from assaults in Congress. He is based in Washington, D.C.
Former Administrator, U.S. Environmental Protection Agency
Scott Pruitt served as the 14th Administrator of the U.S. Environmental Protection Agency.
As Administrator, Mr. Pruitt’s overarching goal was to lead EPA in a way that our future generations inherit a better and healthier environment as he works with the thousands of dedicated public servants at EPA who have devoted their careers to helping realize this shared vision, while faithfully administering environmental laws.
Prior to the EPA, Pruitt served as the Attorney General for Oklahoma. Almost immediately upon taking office, he worked with his Democratic counterpart in Arkansas to reach agreement to study the water quality of the Illinois River, which crosses the border between the two states and has been enjoyed by generations of Oklahomans. The Statement of Joint Principles provides for a best science study using EPA-approved methods, with both states agreeing, for the first time, to be bound by the outcome.
Also during his tenure as Oklahoma’s Attorney General, Pruitt led an historic water rights settlement between Oklahoma, Oklahoma City and the Choctaw and Chickasaw Tribal Nations that preserved the ecosystems of scenic lakes and rivers on native lands. The agreement, which required Congressional approval, was enacted into Section 3608 of Public Law 114-322 and signed in December 2016. It provides a framework that fosters intergovernmental collaboration on significant water resource concerns with the settlement area, while at the same time protecting existing water rights and affirming the state’s role in water rights permitting and administration.
Water settlement cases can be lengthy, costly, divisive and disruptive; however under Pruitt’s forward-thinking leadership, the process was hailed by all parties as one of commitment, hard work, perseverance and cooperation.
Pruitt became a national leader through a career of advocating to keep power in the hands of hard-working Americans. He has a proven track record of working with others – including industry, farmers, ranchers, landowners and small business owners - who want to do the right thing by the environment.
He has dedicated his career to creating policy that serves the people. He strongly believes that environmental law, policy and progress are all based on cooperation between the states, cooperation between the states and EPA, and cooperation between regulators and the public. As Attorney General for Oklahoma, he led the state’s legal challenges against property rights intrusion, while protecting Oklahoma’s natural resources and environment.
He is recognized as a national leader in the cause to restore the proper balance between the states and federal government, and he established Oklahoma’s first federalism unit to combat unwarranted regulation and overreach by the federal government.
Before being elected attorney general, he served eight years in the Oklahoma State Senate where he was a leading voice for fiscal responsibility.
After earning his Bachelor’s Degree from Georgetown College and graduating from the University of Tulsa College of Law, Pruitt went into private legal practice, specializing in constitutional law.
In addition to his life as a civil servant, Pruitt is a successful entrepreneur. As a co-owner and managing general partner of Oklahoma City’s Triple-A minor league baseball affiliate, the Oklahoma City Redhawks, Mr. Pruitt took over the team’s marketing operations and helped the team become one of the minor league leaders in attendance and merchandise sales.
Pruitt is, first and foremost, a family man. He and Marlyn, his wife of 27 years, proudly raised their daughter, McKenna, and son, Cade, in Tulsa. Pruitt has made it a priority to pass on to his children the same principled family values with which he was raised.
Partner, Baker Hostetler LLP
David Rivkin is a member of the firm's litigation, international and environmental teams and is co-leader of the firm's national appellate practice. He has extensive experience in constitutional, administrative and international law litigation and has been involved in numerous high-profile cases. With his prior experience in the government sector, David draws on a wealth of knowledge when providing compliance advice to companies and handling enforcement proceedings before government agencies on issues arising out of multilateral and unilateral sanctions, the Foreign Corrupt Practices Act (FCPA), anti-boycott issues, bankruptcy and financial fraud matters, and environmental and energy issues.
David has developed and implemented legislative, regulatory and litigation initiatives for two presidential administrations. Over the years, he has published hundreds of articles, op-eds, book reviews and book chapters on a variety of international, legal, constitutional, defense, arms control, foreign policy, environmental and energy issues for various newspapers and magazines, including The Wall Street Journal, The Washington Post, The New York Times, USA Today and The Los Angeles Times, and has been a frequent commentator and guest on TV and radio shows including ABC, CBS, NBC, CNN, Fox News, NPR and PBS.
Laurence H. Silberman Chair in Constitutional Governance and Senior Fellow, American Enterprise Institute; Co-Director, Antonin Scalia Law School’s C. Boyden Gray Center for the Study of the Administrative State
Adam J. White is the Laurence H. Silberman Chair in Constitutional Governance and senior fellow at the American Enterprise Institute, where he focuses on the Supreme Court and the administrative state. Concurrently, he codirects the Antonin Scalia Law School’s C. Boyden Gray Center for the Study of the Administrative State.
Mr. White practiced constitutional and administrative law, particularly in the regulation of energy and financial markets. He started his legal career as a law clerk for Judge David B. Sentelle at the US Court of Appeals for the DC Circuit.
Mr. White has written for the Wall Street Journal, the New York Times, the Washington Post, National Affairs, Commentary, Harvard Journal of Law & Public Policy, and Notre Dame Law Review, among other publications. He is a regular contributor to the Yale Journal on Regulation’s Notice and Comment blog, and for many years, he was one of the Weekly Standard’s lead writers on constitutional law and the Supreme Court.
Mr. White has testified often before Congress, including before the Senate’s Committees on the Judiciary; Commerce, Science, and Transportation; and Homeland Security and Governmental Affairs and before the House’s Judiciary and Financial Services Committees. In 2018, the Senate Committee on the Judiciary called him to testify in Brett Kavanaugh’s Supreme Court confirmation hearings to advise senators on Kavanaugh’s approach to administrative law.
In 2021, he served on the Presidential Commission on the Supreme Court of the United States, where he criticized “Court packing” and other efforts to restructure the Supreme Court. In 2017, he was appointed to serve on the Administrative Conference of the United States. He also serves on the leadership council for the American Bar Association’s Administrative Law and Regulatory Practice Section, which he will chair in 2023–24. Before joining AEI, he was a research fellow at Stanford University’s Hoover Institution and an adjunct fellow at the Manhattan Institute.
Mr. White has a JD from Harvard Law School and a bachelor of business administration from the College of Business at the University of Iowa.
Panel II: A World Without Chevron?
Legislative Branch Review Conference
Washington, DCAdministrator Pruitt’s First Year at EPA
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The Clean Power Plan Goes to Court
Environmental Law & Property Rights Practice Group
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