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.
Judge, United States Court of Appeals, Sixth Circuit
John K. Bush is a Circuit Judge on the United States Court of Appeals for the Sixth Circuit. His chambers are in Louisville, Kentucky. Prior to joining the court, Judge Bush was a partner in the Louisville office of Bingham Greenebaum Doll LLP, where he also was co-chair of the firm’s litigation department. He began his legal practice in the Washington, D.C. office of Gibson Dunn & Crutcher LLP.
Judge Bush served as a law clerk for Judge J. Smith Henley of the United States Court of Appeals for the Eighth Circuit. He was graduated summa cum laude from Vanderbilt University in 1986, and cum laude from Harvard Law School in 1989.
United States Attorney, Eastern District of California
Mr. Grant was appointed by Attorney General Pam Bondi to serve as the United States Attorney for the Eastern District of California beginning on August 11, 2025. Pursuant to 28 U.S.C. § 546(d), he was further appointed by the district court effective December 9, 2025.
Mr. Grant is a veteran of the Department of Justice, having served twice in Washington, D.C.: from 1991 to 1993 as an Attorney-Adviser in the Office of Legal Counsel, and from 2017 to 2021 as a Deputy Assistant Attorney General in the Environment and Natural Resources Division (ENRD). During his tenure at ENRD, he supervised more than a hundred Department litigators advancing the interests of the United States and its agencies in both enforcement and defensive matters, both civil and criminal.
In addition to his service in the Department, Mr. Grant has decades of experience in private practice in Washington, D.C. and Sacramento. That experience includes arguments in the U.S. Supreme Court, the California Supreme Court, and numerous other federal and state courts.
Mr. Grant served as a law clerk to Chief Justice Warren E. Burger (retired) and Associate Justice Clarence Thomas during the Supreme Court’s October 1994 Term. Earlier he served as a law clerk to Judge Edith H. Jones of the U.S. Court of Appeals for the Fifth Circuit in Houston, Texas.
Mr. Grant grew up in Modesto, California and raised his family in Sacramento County. He attended the University of California, Berkeley, from which he earned a bachelor’s degree in economics (1986) and a law degree (1990).
Emeritus Dean and Professor of Law, Lewis & Clark Law School
Professor Huffman joined the law school faculty in 1973, was appointed Acting Dean in 1993 and Dean in 1994, and returned to full time teaching in 2006. Born in Fort Benton, Montana, Jim graduated from Montana State University, the Fletcher School of Law and Diplomacy at Tufts University, and the University of Chicago Law School. He has been a visiting professor at Auckland University in New Zealand, the University of Oregon, the University of Athens in Greece and Universidad Francisco Marroquin in Guatemala. He was also a fellow at the Humane Studies Institute and a Distinguished Bradley Scholar at the Heritage Foundation. Jim serves on the boards of the National Crime Victims Law Institute, the Foundation for Research on Economics and the Environment, the Classroom Law Project, and the Rocky Mountain Mineral Law Foundation. He is a member and former Chair of the Executive Committee of the Environment and Property Rights Practice Group of the Federalist Society. He is a member of the Montana Bar Association and is admitted to practice before the United States Court of Appeals for the Federal Circuit and the United States Supreme Court. He is the author of more than 100 articles and chapters on a wide array of legal topics.
Senior Fellow, Ave Maria School of Law and Host of the Four Boxes Diner Second Amendment Channel
Mark W. Smith is Visiting Fellow in Pharmaceutical Public Policy and Law in the Department of Pharmacology at the University of Oxford; Presidential Scholar and a Senior Fellow in Law and Public Policy at The King’s College; and Distinguished Scholar and Senior Fellow of Law and Public Policy at the Ave Maria School of Law.
He is a constitutional attorney and Host of the Four Boxes Diner YouTube channel—which provides scholarly and historical analyses of the Second Amendment. Mark is also a New York Times bestselling author.
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.
Judge, United States Court of Appeals, Sixth Circuit
John K. Bush is a Circuit Judge on the United States Court of Appeals for the Sixth Circuit. His chambers are in Louisville, Kentucky. Prior to joining the court, Judge Bush was a partner in the Louisville office of Bingham Greenebaum Doll LLP, where he also was co-chair of the firm’s litigation department. He began his legal practice in the Washington, D.C. office of Gibson Dunn & Crutcher LLP.
Judge Bush served as a law clerk for Judge J. Smith Henley of the United States Court of Appeals for the Eighth Circuit. He was graduated summa cum laude from Vanderbilt University in 1986, and cum laude from Harvard Law School in 1989.
United States Attorney, Eastern District of California
Mr. Grant was appointed by Attorney General Pam Bondi to serve as the United States Attorney for the Eastern District of California beginning on August 11, 2025. Pursuant to 28 U.S.C. § 546(d), he was further appointed by the district court effective December 9, 2025.
Mr. Grant is a veteran of the Department of Justice, having served twice in Washington, D.C.: from 1991 to 1993 as an Attorney-Adviser in the Office of Legal Counsel, and from 2017 to 2021 as a Deputy Assistant Attorney General in the Environment and Natural Resources Division (ENRD). During his tenure at ENRD, he supervised more than a hundred Department litigators advancing the interests of the United States and its agencies in both enforcement and defensive matters, both civil and criminal.
In addition to his service in the Department, Mr. Grant has decades of experience in private practice in Washington, D.C. and Sacramento. That experience includes arguments in the U.S. Supreme Court, the California Supreme Court, and numerous other federal and state courts.
Mr. Grant served as a law clerk to Chief Justice Warren E. Burger (retired) and Associate Justice Clarence Thomas during the Supreme Court’s October 1994 Term. Earlier he served as a law clerk to Judge Edith H. Jones of the U.S. Court of Appeals for the Fifth Circuit in Houston, Texas.
Mr. Grant grew up in Modesto, California and raised his family in Sacramento County. He attended the University of California, Berkeley, from which he earned a bachelor’s degree in economics (1986) and a law degree (1990).
Emeritus Dean and Professor of Law, Lewis & Clark Law School
Professor Huffman joined the law school faculty in 1973, was appointed Acting Dean in 1993 and Dean in 1994, and returned to full time teaching in 2006. Born in Fort Benton, Montana, Jim graduated from Montana State University, the Fletcher School of Law and Diplomacy at Tufts University, and the University of Chicago Law School. He has been a visiting professor at Auckland University in New Zealand, the University of Oregon, the University of Athens in Greece and Universidad Francisco Marroquin in Guatemala. He was also a fellow at the Humane Studies Institute and a Distinguished Bradley Scholar at the Heritage Foundation. Jim serves on the boards of the National Crime Victims Law Institute, the Foundation for Research on Economics and the Environment, the Classroom Law Project, and the Rocky Mountain Mineral Law Foundation. He is a member and former Chair of the Executive Committee of the Environment and Property Rights Practice Group of the Federalist Society. He is a member of the Montana Bar Association and is admitted to practice before the United States Court of Appeals for the Federal Circuit and the United States Supreme Court. He is the author of more than 100 articles and chapters on a wide array of legal topics.
Senior Fellow, Ave Maria School of Law and Host of the Four Boxes Diner Second Amendment Channel
Mark W. Smith is Visiting Fellow in Pharmaceutical Public Policy and Law in the Department of Pharmacology at the University of Oxford; Presidential Scholar and a Senior Fellow in Law and Public Policy at The King’s College; and Distinguished Scholar and Senior Fellow of Law and Public Policy at the Ave Maria School of Law.
He is a constitutional attorney and Host of the Four Boxes Diner YouTube channel—which provides scholarly and historical analyses of the Second Amendment. Mark is also a New York Times bestselling author.
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.
Judge, United States Court of Appeals, Sixth Circuit
John K. Bush is a Circuit Judge on the United States Court of Appeals for the Sixth Circuit. His chambers are in Louisville, Kentucky. Prior to joining the court, Judge Bush was a partner in the Louisville office of Bingham Greenebaum Doll LLP, where he also was co-chair of the firm’s litigation department. He began his legal practice in the Washington, D.C. office of Gibson Dunn & Crutcher LLP.
Judge Bush served as a law clerk for Judge J. Smith Henley of the United States Court of Appeals for the Eighth Circuit. He was graduated summa cum laude from Vanderbilt University in 1986, and cum laude from Harvard Law School in 1989.
United States Attorney, Eastern District of California
Mr. Grant was appointed by Attorney General Pam Bondi to serve as the United States Attorney for the Eastern District of California beginning on August 11, 2025. Pursuant to 28 U.S.C. § 546(d), he was further appointed by the district court effective December 9, 2025.
Mr. Grant is a veteran of the Department of Justice, having served twice in Washington, D.C.: from 1991 to 1993 as an Attorney-Adviser in the Office of Legal Counsel, and from 2017 to 2021 as a Deputy Assistant Attorney General in the Environment and Natural Resources Division (ENRD). During his tenure at ENRD, he supervised more than a hundred Department litigators advancing the interests of the United States and its agencies in both enforcement and defensive matters, both civil and criminal.
In addition to his service in the Department, Mr. Grant has decades of experience in private practice in Washington, D.C. and Sacramento. That experience includes arguments in the U.S. Supreme Court, the California Supreme Court, and numerous other federal and state courts.
Mr. Grant served as a law clerk to Chief Justice Warren E. Burger (retired) and Associate Justice Clarence Thomas during the Supreme Court’s October 1994 Term. Earlier he served as a law clerk to Judge Edith H. Jones of the U.S. Court of Appeals for the Fifth Circuit in Houston, Texas.
Mr. Grant grew up in Modesto, California and raised his family in Sacramento County. He attended the University of California, Berkeley, from which he earned a bachelor’s degree in economics (1986) and a law degree (1990).
Emeritus Dean and Professor of Law, Lewis & Clark Law School
Professor Huffman joined the law school faculty in 1973, was appointed Acting Dean in 1993 and Dean in 1994, and returned to full time teaching in 2006. Born in Fort Benton, Montana, Jim graduated from Montana State University, the Fletcher School of Law and Diplomacy at Tufts University, and the University of Chicago Law School. He has been a visiting professor at Auckland University in New Zealand, the University of Oregon, the University of Athens in Greece and Universidad Francisco Marroquin in Guatemala. He was also a fellow at the Humane Studies Institute and a Distinguished Bradley Scholar at the Heritage Foundation. Jim serves on the boards of the National Crime Victims Law Institute, the Foundation for Research on Economics and the Environment, the Classroom Law Project, and the Rocky Mountain Mineral Law Foundation. He is a member and former Chair of the Executive Committee of the Environment and Property Rights Practice Group of the Federalist Society. He is a member of the Montana Bar Association and is admitted to practice before the United States Court of Appeals for the Federal Circuit and the United States Supreme Court. He is the author of more than 100 articles and chapters on a wide array of legal topics.
Senior Fellow, Ave Maria School of Law and Host of the Four Boxes Diner Second Amendment Channel
Mark W. Smith is Visiting Fellow in Pharmaceutical Public Policy and Law in the Department of Pharmacology at the University of Oxford; Presidential Scholar and a Senior Fellow in Law and Public Policy at The King’s College; and Distinguished Scholar and Senior Fellow of Law and Public Policy at the Ave Maria School of Law.
He is a constitutional attorney and Host of the Four Boxes Diner YouTube channel—which provides scholarly and historical analyses of the Second Amendment. Mark is also a New York Times bestselling author.
Associate Professor of Law and Director, Religious Liberty Clini, Stanford Law School
Jim Sonne is a professor at law at Stanford Law School, and is the founding director of the law school’s Religious Liberty Clinic, the only full-time program in the country where students learn the practice of law through supervised litigation in that field. He is an experienced and award-winning teacher, practitioner, and scholar, with expertise in law and religion issues.
Professor Sonne received his BA with honors from Duke University and his JD with honors from Harvard Law School. He is a former law clerk to Judge Edith Brown Clement of the U.S. Court of Appeals for the Fifth Circuit. Before joining the law school in 2012, Sonne was an appellate lawyer at Horvitz & Levy in Los Angeles.
Senior Litigation Counsel, American Center for Law and Justice
Walter M. Weber is Senior Counsel for the ACLJ in the Washington, D.C. office. A highly regarded legal writer, Weber received his bachelor’s degree from Princeton University and his law degree from Yale Law School.
Weber emphasizes First Amendment law and has written briefs in many landmark cases at the Supreme Court including NOW v. Scheidler, Lamb’s Chapel v. Center Moriches School District and Bray v. Alexandria Women’s Health Clinic.
Weber has argued more than a dozen times in appeals before federal and state courts. Prior to joining the ACLJ, Weber served as a staff attorney with the Catholic League for Religious and Civil Rights.
Founder, Libertas-West Project
Karen Lugo is a constitutional law consultant and national security analyst. She was Director of the Center for Tenth Amendment at Texas Public Policy Foundation from 2013 to 2015. When living in California, she was Co-Director of the Center for Constitutional Jurisprudence Center. From 2005 – 2012, she was a clinical visiting and adjunct professor at Chapman University School of Law where she co-taught the advanced Constitutional Law Clinic. Karen has co-authored and written circuit-level and Supreme Court amicus briefs on such issues as FISA Surveillance, Healthcare Reform, Arizona’s Border Security, Gay Marriage, The Ten Commandments, Eminent Domain, Christian Clubs on University Campuses, and Material Support for Terrorists.
Karen is the founder of the Libertas-West Project, a center for study Islamic integration and radicalization issues. In this capacity, she consulted with the Center for Security Policy to write a book on local over-watch of mosque construction and community engagement called: Mosques in America: A Guide to Accountable Permit Hearings and Continuing Citizen Oversight.
Karen writes and speaks for European and American groups on the importance of basing assimilation efforts on principles of Western exceptionalism. She presented a policy brief to the French Conseil d’Etat analyzing the legal implications of banning the burqa. Ms. Lugo has written one of the most comprehensive overviews of sharia law in American courts, American Family Law and Sharia-Compliant Marriages, for the Federalist Society law journal, Engage. She has written several white papers on the American Law for American Courts legislation and sharia tribunals in America.
Ms. Lugo was an appointee to the California Advisory Committee to the U.S. Commission on Civil Rights. She also taught a Human Rights law course on the contrast between French and English Enlightenment theories in Strasbourg, France.
Until moving from California, Ms. Lugo was a member of the David Horowitz Freedom Center Board of Directors. She was also a regular guest on the Orange County PBS local issues debate program, Inside OC, and she is a contributor to Pajamas Media, National Review Online, City Journal, American Spectator, American Greatness, Townhall.com, American Thinker, Daily Caller, and Family Security Matters. She has been interviewed by dozens of radio hosts and has spoken for civic groups on constitutional and cultural concerns.
Director, Project on Criminal Justice, Cato Institute
Matthew Cavedon is the Director of the Cato Institute’s Project on Criminal Justice. He focuses on reforming plea-driven mass adjudication, ensuring police accountability, and defending constitutional criminal originalism. Cavedon’s scholarship has been published (or is forthcoming in) publications including the Arizona State Law Journal, Cato Supreme Court Review, Seattle University Law Review, and Georgetown Journal of Law and Public Policy. Formerly a Georgia public defender and fellow at the Institute for Justice, Cavedon has taught law school courses on criminal law and procedure, as well as the First Amendment. Cavedon clerked for a U.S. district court and the Supreme Court of Georgia. He came to Cato following a fellowship at the Emory University Center for the Study of Law and Religion.
Attorney General of Tennessee
Jonathan Skrmetti was sworn in to an eight-year term as Tennessee’s Attorney General and Reporter on September 1, 2022.
Prior to his current role, General Skrmetti served as Chief Counsel to Governor Bill Lee and as Chief Deputy Attorney General to his predecessor, Tennessee Attorney General Herbert Slatery.
Before working for the State of Tennessee, General Skrmetti was a partner at Butler Snow LLP in Memphis. His legal career began with nearly a decade as a federal prosecutor. He worked at the Civil Rights Division at Main Justice and then at the Memphis U.S. Attorney’s Office and prosecuted sex traffickers, corrupt government officials, and violent white supremacists. In addition, General Skrmetti taught cyberlaw as an adjunct professor at the University of Memphis.
General Skrmetti earned honors degrees from George Washington University, the University of Oxford, and Harvard Law School, where he was editor-in-chief of the Harvard Journal of Law & Public Policy. Following law school, Jonathan clerked for Judge Steven Colloton on the U.S. Court of Appeals for the Eighth Circuit. He lives in Franklin, Tennessee, with his wife and four children.
Carol Matheis practices law business litigation and insurance law in Newport Beach, California. She earned her J.D. at Western University College of Law and is a graduate of George Mason University.
New York City Lawyers & Young Lawyers Repeal Day Happy Hour
New York, NYClimate Change Nuisance Suits
2018 National Lawyers Convention
Washington, DCClimate Change Nuisance Suits
David Bookbinder, John K. Bush, Eric Grant, James L. Huffman, Mark W. Smith
Should climate change responsibility be evaluated in the courts or by the elected policymaking branches?...
Climate Change Nuisance Suits
David Bookbinder, John K. Bush, Eric Grant, James L. Huffman, Mark W. Smith
Should climate change responsibility be evaluated in the courts or by the elected policymaking branches?...
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Party Like It’s 1935?: Gundy v. United States and the Future of the Non-Delegation Doctrine
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Federalism and Social Policy with Robert Doar
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Carol M. Matheis
The “California Rule” as it has come to be known, was set forth in the...