Lecturer in Law, University of Chicago Law School
Robert Gasaway is a Lecturer in Law at the University of Chicago Law School. He was formerly a Partner at Kirkland & Ellis LLP in their Washington office. He has represented and advised corporate clients on a wide variety of matters before federal courts, state courts, federal administrative agencies, and federal and state legislative bodies. Mr. Gasaway focuses his practice on appellate litigation, representing clients in the preparation of integrated, multiforum trial and appellate strategies in high-risk sets of related cases.
Director of Regulatory and State Affairs, Institute for Energy Research
Daniel Simmons is Director of State Affairs at the Institute for Energy Research. He oversees energy research and outreach at the state level. Before joining IER, Simmons served as the Director of the Natural Resources Task Force at the American Legislative Exchange Council (ALEC). ALEC’s Natural Resources Task Force promotes policy innovations through markets, property rights, and the rule of law in energy, environment, natural resources, and agricultural policy areas.
Prior to working for ALEC, Simmons was a Research Fellow at the Mercatus Center at George Mason University. He analyzed proposed federal regulations and wrote comments to federal agencies during the rulemaking process. He also drafted law review articles based on a current regulatory and legal issues.
Previous to working at the Mercatus Center, Simmons served as Legislative Staff for the Committee on Resources in the U.S. House of Representatives where he handled endangered species and forestry issues.
Simmons holds a B.A. in Economics from Utah State University and a J.D. from George Mason University School of Law. He is a member of the Virginia State Bar.
Tazewell Taylor Professor of Law and William H. Cabell Research Professor, William & Mary Law School
Jonathan H. Adler joined the William & Mary law faculty as the Tazwell Taylor Professor of Law and William H. Cabell Research Professor in 2025. Prior to joining the faculty, he was the inaugural Johan Verheij Memorial Professor of Law and the founding Director of the Coleman P. Burke Center for Environmental Law at the Case Western Reserve University School of Law.
Professor Adler is the author or editor of seven books, including Climate Liberalism: Perspectives on Liberty, Property and Pollution (Palgrave, 2023), Marijuana Federalism: Uncle Sam and Mary Jane (Brookings Institution Press, 2020), Business and the Roberts Court (Oxford University Press, 2016) and Rebuilding the Ark: New Perspectives on Endangered Species Act Reform (AEI Press, 2011).
His articles have appeared in publications ranging from the Harvard Environmental Law Review and Yale Journal on Regulation to the Wall Street Journal, New York Times, and Washington Post. He has testified before Congress a dozen times, and his work has been cited in the U.S. Supreme Court. A 2024 study identified Professor Adler as the seventh most cited legal academic in administrative and environmental law from 2019 to 2023.
Professor Adler is a contributing editor to Civitas Outlook and a regular contributor to the popular legal blog, The Volokh Conspiracy. A regular commentator on constitutional and regulatory issues, he has appeared on numerous radio and television programs, ranging from the PBS Newshour and National Public Radio to the Fox News Channel and Entertainment Tonight.
Professor Adler is a senior fellow at the Property & Environment Research Center in Bozeman, Montana. In 2018, Professor Adler was elected to membership in the American Law Institute and helped co-found the organization Checks and Balances. In 2024, Professor Adler was appointed a public member of the Administrative Conference of the United States.
Professor Adler clerked for the Honorable David B. Sentelle on the U.S. Court of Appeals for the District of Columbia Circuit.
Research Professor, Regulatory Studies Center, The George Washington University
Brian Mannix is a Research Professor at George Washington University’s Regulatory Studies Center. From 2005 – 2009 he was the EPA’s Associate Administrator for Policy, Economics, and Innovation. Earlier he served as the Deputy Secretary of Natural Resources for the Commonwealth of Virginia. Brian was an economist at OIRA from 1981 – 1987, and then served as managing editor of Regulation magazine at the American Enterprise Institute.
Executive Vice President, The Federalist Society
Dean Reuter is Executive Vice President at the Federalist Society for Law and Public Policy Studies. He has served in two federal government agency Offices of the Inspector General, as Counsel to the Inspector General and Deputy Inspector General, responsible for policing the use of federal funds granted and contracted through those agencies. As such, he helped conduct and oversee criminal investigations across the country. He is the principal author of the non-fiction book, The Hidden Nazi: The Untold Story of America's Deal with the Devil, and editor of Liberty’s Nemesis: The Unchecked Expansion of the State and Confronting Terror: 9/11 and the Future of American National Security. He was appointed by the President and served as Vice-Chairman of the Board of Directors of the Corporation for National and Community Service, and recently served as an appointee on the U.S. Commission on Presidential Scholars. He is a graduate of Hood College (BA with Honors) and the University of Maryland School of Law.
Senior Fellow, Center for Energy and Environment, Competitive Enterprise Institute
Marlo Lewis, Jr. is a Senior Fellow at the Competitive Enterprise Institute, where he writes on global warming, energy policy, and other public policy issues. Prior to joining CEI in April 2002, he served as Director of External Relations at the Reason Foundation in Los Angeles, California. During the 106th Congress, Marlo served as Staff Director of the House Government Reform Subcommittee on National Economic Growth, Natural Resources, and Regulatory Affairs.
His interests include the science, economics, and politics of global warming policy; the precautionary principle; environmentalism and religion; and the moral basis of free enterprise. Marlo has been published in The Washington Times, Investors Business Daily, TechCentralStation, National Review, and Interpretation: A Journal of Political Philosophy. He has appeared on various television and radio programs, and his ideas have been featured in radio commentary by Rush Limbaugh and G. Gordon Liddy.
Before joining CEI for his first tenure with the organization in 1993, Marlo served as Research Director for the grassroots organization, Citizens Against Government Waste. Earlier, he was a Staff Consultant to the House Foreign Affairs Subcommittee on International Economic Policy and Trade, a Special Assistant at the State Department Bureau of Inter-American Affairs and Bureau of International Organization Affairs, and a Visiting Assistant Professor of Political Science at Claremont McKenna College. He holds a Ph.D. in Government from Harvard University and a B.A. in Political Science from Claremont McKenna College.
Assistant Attorney General, Environment and Natural Resources Division, U.S. Department of Justice
Jeffrey Bossert Clark was born in Philadelphia, Pennsylvania on April 17, 1967. He is a graduate of Harvard University (A.B. in economics and history, 1989), the University of Delaware (M.A. in urban affairs and public policy, 1993), and the Georgetown University Law Center (J.D., 1995).
Mr. Clark began his career working for the State of Delaware’s Department of Finance, Division of Revenue as an economics analyst in the field of tax policy. During his tenure from 1989 to 1992, he authored several white papers analyzing Delaware revenue sources. Delaware also selected Mr. Clark to submit an economic report and affidavit to the United States Supreme Court in the original jurisdiction case of Delaware v. New York, 507 U.S. 490 (1993).
He entered Georgetown’s law school in 1992 where he earned honors as an articles editor of the Georgetown Law Journal, an Olin Law & Economics Fellow, and a member of the Order of the Coif. From 1995 to 1996, Mr. Clark clerked for Judge Boggs of the U.S. Court of Appeals of the Sixth Circuit. Mr. Clark then joined the law firm of Kirkland & Ellis as an associate from 1996-2001. He worked as an appellate litigator on numerous Supreme Court and other appellate cases and developed expertise in administrative law, statutory interpretation, as well as antitrust, labor, environmental, and telecommunications law.
Mr. Clark went on to serve in ENRD from 2001-2005 as a Deputy Assistant Attorney General selected by Attorney General Ashcroft and Assistant Attorney General Tom Sansonetti. In that capacity, he supervised ENRD’s Appellate and Indian Resources Sections. He reviewed, edited, and contributed to virtually every brief that ENRD filed in the Courts of Appeals, including several cases of exceptional significance that he personally briefed and argued. During his service in the early 2000s, Mr. Clark argued and won numerous cases in multiple U.S. Courts of Appeals and worked on all Supreme Court cases arising out of ENRD’s work.
In 2005, Mr. Clark returned to Kirkland & Ellis LLP as a partner, where he litigated until his return to ENRD in 2018. There he worked on numerous multi-billion-dollar matters and continued to argue many appellate cases. His practice operated at all levels — appellate litigation, trial court litigation, agency proceedings, and regulatory and litigation counseling. He has been named a Super Lawyer for multiple years running, highlighted in the Legal 500, named to the “Legal Who’s Who for Environmental Law” in Corporate Responsibility Magazine, rated A.V. preeminent by Martindale Hubbell, and named a member of the National Association of Distinguished Counsel’s Nation’s One Percent. He also was named one of America’s Top 100 High Stakes Litigators.
President Trump nominated Mr. Clark to be the Assistant Attorney General of the Environment and Natural Resources Division (ENRD) on June 7, 2017. He was confirmed by the U.S. Senate on October 11, 2018 and sworn into office on November 1, 2018, followed by an investiture ceremony on November 15, 2018.
Lecturer in Law, University of Chicago Law School
Robert Gasaway is a Lecturer in Law at the University of Chicago Law School. He was formerly a Partner at Kirkland & Ellis LLP in their Washington office. He has represented and advised corporate clients on a wide variety of matters before federal courts, state courts, federal administrative agencies, and federal and state legislative bodies. Mr. Gasaway focuses his practice on appellate litigation, representing clients in the preparation of integrated, multiforum trial and appellate strategies in high-risk sets of related cases.
Tazewell Taylor Professor of Law and William H. Cabell Research Professor, William & Mary Law School
Jonathan H. Adler joined the William & Mary law faculty as the Tazwell Taylor Professor of Law and William H. Cabell Research Professor in 2025. Prior to joining the faculty, he was the inaugural Johan Verheij Memorial Professor of Law and the founding Director of the Coleman P. Burke Center for Environmental Law at the Case Western Reserve University School of Law.
Professor Adler is the author or editor of seven books, including Climate Liberalism: Perspectives on Liberty, Property and Pollution (Palgrave, 2023), Marijuana Federalism: Uncle Sam and Mary Jane (Brookings Institution Press, 2020), Business and the Roberts Court (Oxford University Press, 2016) and Rebuilding the Ark: New Perspectives on Endangered Species Act Reform (AEI Press, 2011).
His articles have appeared in publications ranging from the Harvard Environmental Law Review and Yale Journal on Regulation to the Wall Street Journal, New York Times, and Washington Post. He has testified before Congress a dozen times, and his work has been cited in the U.S. Supreme Court. A 2024 study identified Professor Adler as the seventh most cited legal academic in administrative and environmental law from 2019 to 2023.
Professor Adler is a contributing editor to Civitas Outlook and a regular contributor to the popular legal blog, The Volokh Conspiracy. A regular commentator on constitutional and regulatory issues, he has appeared on numerous radio and television programs, ranging from the PBS Newshour and National Public Radio to the Fox News Channel and Entertainment Tonight.
Professor Adler is a senior fellow at the Property & Environment Research Center in Bozeman, Montana. In 2018, Professor Adler was elected to membership in the American Law Institute and helped co-found the organization Checks and Balances. In 2024, Professor Adler was appointed a public member of the Administrative Conference of the United States.
Professor Adler clerked for the Honorable David B. Sentelle on the U.S. Court of Appeals for the District of Columbia Circuit.
Research Professor, Regulatory Studies Center, The George Washington University
Brian Mannix is a Research Professor at George Washington University’s Regulatory Studies Center. From 2005 – 2009 he was the EPA’s Associate Administrator for Policy, Economics, and Innovation. Earlier he served as the Deputy Secretary of Natural Resources for the Commonwealth of Virginia. Brian was an economist at OIRA from 1981 – 1987, and then served as managing editor of Regulation magazine at the American Enterprise Institute.
Director of Regulatory and State Affairs, Institute for Energy Research
Daniel Simmons is Director of State Affairs at the Institute for Energy Research. He oversees energy research and outreach at the state level. Before joining IER, Simmons served as the Director of the Natural Resources Task Force at the American Legislative Exchange Council (ALEC). ALEC’s Natural Resources Task Force promotes policy innovations through markets, property rights, and the rule of law in energy, environment, natural resources, and agricultural policy areas.
Prior to working for ALEC, Simmons was a Research Fellow at the Mercatus Center at George Mason University. He analyzed proposed federal regulations and wrote comments to federal agencies during the rulemaking process. He also drafted law review articles based on a current regulatory and legal issues.
Previous to working at the Mercatus Center, Simmons served as Legislative Staff for the Committee on Resources in the U.S. House of Representatives where he handled endangered species and forestry issues.
Simmons holds a B.A. in Economics from Utah State University and a J.D. from George Mason University School of Law. He is a member of the Virginia State Bar.
Court to Rule on Greenhouse Gases - Utility Air Regulatory Group v. EPA - Podcast
Robert R. Gasaway
To listen, please right click on the audio file you wish to hear and then...
Court to Rule on Greenhouse Gases - Utility Air Regulatory Group v. EPA
TeleforumIs EPA's NAAQS Process Inexorably Monotonic? - Podcast
Daniel R. Simmons, Jonathan H. Adler, Brian F. Mannix, Dean Reuter
The Clean Air Act requires the EPA to revisit its National Ambient Air Quality Standards...
Is EPA's NAAQS Process Inexorably Monotonic?
TeleforumEPA Regulation of Fuel Economy: Congressional Intent or Climate Coup?
Marlo Lewis
Note from the Editor:1 This paper assesses EPA’s rule setting standards for motor vehicle greenhouse...
The Recent Controversy Over the Non Delegation Doctrine
Jeffrey Bossert Clark
On May 14, 1999, in American Trucking Association v. EPA2 the United States Court of...
Comment on American Trucking Associations, et al., v. EPA
Edward W. Warren
The D.C. Circuit's opinion in American Trucking Associations v. EPA (ATA)1 is both more and...