Senior Judge, United States District Court, District of Columbia
Judge Leon was appointed to the United States District Court in February 2002. He received his A.B. from Holy Cross College in 1971, his J.D. cum laude from Suffolk Law School in 1974, and his LL.M. from Harvard Law School in 1981. Immediately prior to his appointment to the bench, Judge Leon was engaged in private practice in Washington, D.C., as a partner in the Washington office of Baker & Hostetler (1989-1999), and Vorys, Sater, Seymour and Pease (1999-2002). Prior to and while in private practice, Judge Leon served as counsel to Congress in the investigations of three sitting Presidents. In 1987, he was the Deputy Chief Minority Counsel for the U.S. House Select “Iran-Contra” Committee. From 1992-1993, he was the Chief Minority Counsel to the U.S. House Foreign Affairs Committee’s “October Surprise” Task Force. In 1994, Judge Leon was Special Counsel to the U.S. House Banking Committee for its “Whitewater” investigation. He also served in 1997 as Special Counsel to the bipartisan U.S. House Ethics Reform Task Force. Earlier in his career, Judge Leon served at the U.S. Department of Justice in a number of positions including Deputy Assistant Attorney General in the Environment Division, Senior Trial Attorney in the Criminal Section of the Tax Division, and as a Special Assistant United States Attorney in the Southern District of New York. He also served as a Commissioner on the White House Fellows Commission and the Judicial Review Commission on Foreign Asset Control. A former full-time law professor at St. John’s Law School (1979-1983), Judge Leon is currently an adjunct law professor at the Georgetown University Law Center and the George Washington University Law School.
Raymond & Miriam Ehrlich Chair in US Constitutional Law, University of Florida Levin College of Law
Tracey Maclin is Professor of Law and Raymond & Miriam Ehrlich Eminent Scholar Chair. Prior to joining the University of Florida faculty, he was a professor of law and Joseph Lipsitt Faculty Research Scholar at Boston University School of Law. He has also taught at Cornell Law School, Harvard Law School and the University of Kentucky College of Law. Before entering law teaching, Professor Maclin served as a law clerk to Judge Boyce F. Martin, Jr. of the United States Court of Appeals for the Sixth Circuit and worked at Cahill, Gordon & Reindel.
Professor Maclin teaches courses in Constitutional Law and Constitutional Criminal Procedure. He also teaches a seminar on the Supreme Court’s cases in criminal procedure, criminal law, habeas corpus and the death penalty. His scholarship focuses on the Fourth Amendment and the Self-Incrimination Clause of the Fifth Amendment. He has published many law review articles and book chapters on constitutional criminal procedure topics. He is the author of The Supreme Court and the Fourth Amendment’s Exclusionary Rule (Oxford University Press 2013). In addition to his legal scholarship, Professor Maclin has authored over a dozen amicus curiae briefs and served as counsel of record for the American Civil Liberties Union, the National Association of Criminal Defense Lawyers and the Cato Institute in Fourth Amendment cases in the United States Supreme Court.
Emeritus Faculty, University of Colorado Law School
William Pizzi has been a member of the Colorado Law School faculty since 1975. He came to Colorado in 1975, after spending a few years as Assistant U.S. Attorney in New Jersey. He specializes in criminal law, with special interest in foreign criminal trial systems. Professor Pizzi's belief in the comparative study of law has compelled him to coordinate many of the law school's study abroad programs, and he recently served as a professor on the Semester-at-Sea program. Professor Pizzi has always been active in Colorado's legal community, working on the Colorado Bar Association's Ethics Committee and, most recently, serving as the reporter for the Governor's Columbine Review Commission. His task was to take the information from more than a year of meetings, testimony and interviews, and put together a cohesive report. He worked to produce the report with help from other members of the commission, while continuing his regular teaching schedule at Colorado Law School. "It was a very difficult task, because there was no model to follow. It was very much a team effort," Professor Pizzi said of the report. He was pleased with the results of the commission and said, "I'm proud of the recommendations that will help make Colorado schools safer."
Solicitor, U.S. Department of Labor
Jonathan Berry is Solicitor at the U.S. Department of Labor, in service to President Trump’s agenda to put American workers first. He leads the Department’s lawyers in advising the Secretary and agency leadership on all aspects of law and in representing the Department in court. He was previously managing partner at Boyden Gray PLLC, where he provided strategic counsel and litigated on issues at the intersection of law, politics, and public policy. Earlier, he headed the regulatory office at Labor, and also served at the Department of Justice, in the first Trump Administration. Mr. Berry served as a law clerk to Judge Jerry E. Smith of the United States Court of Appeals for the Fifth Circuit, and to Associate Justice Samuel A. Alito, Jr., of the Supreme Court of the United States.
General Counsel, xAI and X
Supreme Court & Appellate Litigation Chair, Lex Politica; Of Counsel, Alliance Defending Freedom
Erin Morrow Hawley serves as Chair of Lex Politica's Supreme Court and Appellate Practice overseeing the firm’s strategic appellate litigation and critical motions practice in the trial courts. Erin is an experienced litigator who represents clients in constitutional, regulatory, and appellate matters in federal and state courts throughout the country.
Erin has represented dozens of clients before the Supreme Court of the United States, served as lead counsel in high-profile cases raising novel constitutional and statutory issues, and authored numerous successful petitions for certiorari and briefs in opposition. She has argued in state and federal appellate and trial courts throughout the country, including the Supreme Court of the United States. Erin represents diverse clients in high-stakes litigation from state governments to faith-based nonprofits to Fortune 100 companies. She possesses expertise on a wide range of subject matters including administrative law, the First Amendment, religious liberty, federal jurisdiction, federal preemption, equitable jurisdiction, tax law, the Affordable Care Act, and Title IX.
Erin represents clients in cases where public communications strategy is paramount. She is a sought-after speaker and writer, has testified multiple times before Congress, and is a frequent presenter on constitutional and administrative law issues, including at the Oxford Union, the National Federalist Society Convention, and university campuses across the country. She is a frequent commentator to media outlets, including Fox News, MSNBC, the Wall Street Journal, WORLD, USA Today, the Federalist, and the Hill.
Erin previously oversaw Alliance Defending Freedom’s--where she still serves as Of Counsel--litigation strategies to empower women and protect the dignity of life, defend pregnancy centers’ First Amendment rights from government overreach, and safeguard Americans’ freedoms from the ever-encroaching administrative state.
Vice President for Legal Strategy, Stand Together
Casey Mattox is Vice President for Legal Strategy at Stand Together and Senior Advisor at
Americans for Prosperity. In these roles he advocates for and creates strategies and
partnerships to ensure a constitutionally limited government that protects the civil liberties of all
Americans. Prior to joining Stand Together and AFP Casey’s legal career focused on defending
the First Amendment rights of students, faculty, healthcare workers and religious organizations.
Casey has a J.D. from Boston College School of Law and an undergraduate degree from the
University of Virginia. You can find him on Twitter at @CaseyMattox_ and on LinkedIn at
@Casey-Mattox-ST.
Judge, United States District Court, District of Columbia
Judge Trevor N. McFadden was appointed to the United States District Court for the District of Columbia in 2017. He received his B.A. in 2001 from Wheaton College, IL, magna cum laude. In 2006, he received his J.D. from the University of Virginia School of Law, where he graduated Order of the Coif and was an editor for the Virginia Law Review.
Following graduation from law school, Judge McFadden clerked for Judge Steven Colloton, U.S. Court of Appeals for the Eighth Circuit. He then joined the U.S. Department of Justice, where he served as Counsel to the Deputy Attorney General and as Assistant U.S. Attorney in the District of Columbia. Judge McFadden subsequently became a partner at Baker & McKenzie LLP in Washington, DC, where he focused on white collar investigations. He is also co-author of a treatise, Corporate Settlement Tools: DPAs, NPAs, and Cooperation Agreements.
After four years in private practice, Judge McFadden returned to the U.S. Department of Justice, where he was Deputy Assistant Attorney General and acted as the second-in-command of the Department's Criminal Division. As Deputy Assistant Attorney General, he managed the Division's Fraud and Appellate Sections.
Judge McFadden also has extensive experience in law enforcement. He served as an officer with the Fairfax County, VA, Police Department and as a deputy sheriff in Madison County, VA.
George Mason University Foundation Professor of Law, Antonin Scalia Law School, George Mason University
TODD J. ZYWICKI is George Mason University Foundation Professor of Law at Antonin Scalia Law School at George Mason University and Research Fellow of the George Mason Law and Economics Center. During the Fall 2023 semester he served as the Visiting Scholar in Conservative Thought and Policy for the Bruce Benson Center for the Study of Western Civilization at the University of Colorado-Boulder. From 2020-2021 he was Chair of the Consumer Financial Protection Bureau Taskforce on Federal Consumer Financial Law. In 2021 he was inducted to the American College of Consumer Financial Services Lawyers. He is also a Senior Fellow of the F.A. Hayek Program for the Advanced Study of Politics, Philosophy, and Economics at George Mason University and a former Senior Fellow of the Cato Institute. From 2015-2017 he was Executive Director of the George Mason Law and Economics Center. He served as Co-Editor of the Supreme Court Economic Review from 2006-2017. From 2003-2004, Professor Zywicki served as the Director of the Office of Policy Planning at the Federal Trade Commission. He has also taught at Vanderbilt University Law School, Georgetown University Law Center, Boston College Law School, Mississippi College School of Law, and China University of Political Science and Law.
Professor Zywicki clerked for Judge Jerry E. Smith of the U.S. Court of Appeals for the Fifth Circuit and worked as an associate at Alston & Bird in Atlanta, Georgia, where he practiced bankruptcy and commercial law. He received his J.D. from the University of Virginia, where he was executive editor of the Virginia Tax Review and John M. Olin Scholar in Law and Economics. Professor Zywicki also received an M.A. in Economics from Clemson University and an A.B. cum Laude with high honors in his major from Dartmouth College.
Professor Zywicki is also a Lone Mountain Fellow of the Property and Environment Research Center, a Fellow of the International Centre for Economic Research in Turin, Italy, and a former Senior Fellow of the Goldwater Institute. During the Fall 2008 Semester Professor Zywicki was the Searle Fellow of the George Mason University School of Law and was a 2008-09 W. Glenn Campbell and Rita Ricardo-Campbell National Fellow and the Arch W. Shaw National Fellow at the Hoover Institution on War, Revolution and Peace. He has lectured and consulted with government officials around the world, including Iceland, Italy, Japan, and Guatemala. In 2006 Professor Zywicki served as a Member of the United States Department of Justice Study Group on “Identifying Fraud, Abuse and Errors in the United States Bankruptcy System.”
Professor Zywicki is the author of more than 130 articles in leading law reviews and peer-reviewed economics journals. He is one of the Top 10 most-cited law professors in the field of Commercial Law and one of the Top 25 law professors on Twitter as measured by engagement levels. He is one of the Top 50 Most Downloaded Law Authors at the Social Science Research Network. He has testified multiple times before Congress on issues of consumer bankruptcy law and consumer credit and is a frequent commentator on legal issues in the print and broadcast media, including the Wall Street Journal, New York Times, The Washington Post, The Washington Times, Nightline, The Newshour with Jim Lehrer, Neil Cavuto Show, Fox & Friends, Smerconish, Fox News @ Night with Shannon Bream, Fox Business, CNN, CNBC, Bloomberg News, BBC, The Diane Rehm Show, Lou Dobbs Show, Jerry Doyle Show, and The Laura Ingraham Show.
Professor Zywicki is former Chairman and a current member of the Board of Directors of the Competitive Enterprise Institute, and is a member of the Board of Directors of the Institute for Humane Studies, Bill of Rights Institute, the Executive Committee for the Federalist Society's Financial Institutions and E-Commerce Practice Group, the Board of Trustees of the Foundation for Research on Economics and the Environment. He formerly served on the Governing Board and the Advisory Council for the Financial Services Research Program at George Washington University School of Business. He is currently the Chair of the Academic Advisory Council for the following organizations: The Bill of Rights Institute, the film “We the People in IMAX,” and the McCormick-Tribune Foundation “Freedom Museum” in Chicago, Illinois. He is a member of the Board of Visitors of Ralston College and was a member of the Board of Trustees of Yorktown University. From 2005-2009 he served as an elected Alumni Trustee of the Dartmouth College Board of Trustees.
Senior Fellow, Independent Institute
Dr. Stephen P. Halbrook is a Senior Fellow at the Independent Institute. He has taught legal and political philosophy at George Mason University, Howard University, and Tuskegee Institute, and he received his J.D. from the Georgetown University Law Center and Ph.D. in social philosophy from Florida State University.
The winner of three cases before the U.S. Supreme Court (Printz v. United States, United States v. Thompson/Center Arms Company, and Castillo v. United States), he has testified before the Subcommittee on the Constitution of the Senate Judiciary Committee, Senate Subcommittee on the Constitution, Subcommittee on Crime of the House Judiciary Committee, Senate Governmental Affairs Committee, and House Committee on the District of Columbia.
A contributor to numerous scholarly volumes, he is the author of the books, Gun Control in Nazi-Occupied France: Tyranny and Resistance; Gun Control in the Third Reich: Disarming the Jews and “Enemies of the State”; The Founders’ Second Amendment: Origins of the Right to Bear Arms; That Every Man Be Armed: Evolution of a Constitutional Right; A Right to Bear Arms; Firearms Law Deskbook: Federal and State Criminal Practice; Securing Civil Rights: Freedmen, the Fourteenth Amendment, and the Right to Bear Arms; State and Federal Bills of Rights and Constitutional Guarantees; and Target Switzerland: Swiss Armed Neutrality in World War II. Dr. Halbrook’s scholarly articles have appeared in such journals as the Arizona Journal of International and Comparative Law, Drug Law Report, George Mason University Law Review, Journal of Air Law and Commerce, Journal of Law and Policy, Law & Contemporary Problems, National Law Journal, Northern Kentucky Law Review, St. John’s Journal of Legal Commentary; Seton Hall Constitutional Law Journal, Tennessee Law Review, University of Dayton Law Review, Valparaiso University Law Review, Vermont Law Review, and William & Mary Bill of Rights Journal.
Dr. Halbrook's popular articles have appeared in such publications as the Wall Street Journal, Newsday, San Francisco Chronicle, National Review, Investor’s Business Daily, Kansas City Star, Washington Examiner, Shreveport Times, Sacramento Bee, Providence Journal, Tampa Tribune, Pittsburgh Tribune-Review, History News Network, San Antonio Express-News, The Daily Caller, Detroit News, Honolulu Star Advertiser, Birmingham News, Environmental Forum, USA Today, and Washington Times. He has also appeared on numerous national TV/radio programs on CNN, Fox News Channel, Fox Business Network, Court TV, NewsMax TV, CBN, Voice of America, and C-SPAN.
Assistant Professor of Law, George Mason University, Antonin Scalia Law School
Robert Leider is an Assistant Professor of Law at Antonin Scalia Law School, George Mason University. His scholarly interests are in criminal law, criminal procedure, and constitutional law, especially concerning questions about the use of force and the rule of law. He has written on the law of self-defense, the constitutional allocation of military power, and gun control. Among other places, he has published in the Florida Law Review (forthcoming), the Indiana Law Journal, and the Wall Street Journal.
Before joining Antonin Scalia Law School, Professor Leider was at Arnold & Porter in Washington, DC. He was previously with Mayer Brown LLP and was an Olin-Searle-Smith Fellow at the University of Pennsylvania Law School. He has clerked for Judge Diane S. Sykes, of the U.S. Court of Appeals for the Seventh Circuit, and Justice Clarence Thomas. Professor Leider earned a BA, summa cum laude, from The George Washington University, a JD from Yale Law School, and a PhD in Philosophy (dissertation defended with distinction) from Georgetown University. While at Yale, he served as an articles editor for the Yale Law Journal.
Professor Leider teaches criminal law and torts.
Vice President, Edwin Meese III Institute for the Rule of Law, Advancing American Freedom
John G. Malcolm oversees Advancing American Freedom’s work to increase understanding of the Constitution and the rule of law as Vice President of the organization’s Edwin Meese III Institute for the Rule of Law. Malcolm brings to the challenge a wealth of legal expertise and experience in both the public and private sectors.
Prior to joining Advancing American Freedom in 2025, Malcolm was the Vice President of the Institute for Constitutional Government and the Director of the Meese Center for Legal and Judicial Studies at the Heritage Foundation. Prior to joining Heritage in 2012, Malcolm was general counsel at the U.S. Commission on International Religious Freedom, as well as a distinguished practitioner in residence at Pepperdine Law School. From 2004 to 2009, Malcolm was executive vice president and director of worldwide anti-piracy operations for the Motion Picture Association.
Malcolm served as a deputy assistant attorney general in the Department of Justice’s Criminal Division from 2001 to 2004, where he oversaw sections on computer crime and intellectual property, domestic security, child exploitation and obscenity, and special investigations. Immediately prior to that, he was a founding partner in the Atlanta law firm of Malcolm & Schroeder, LLP.
From 1990 to 1997, Malcolm was an assistant U.S. attorney in Atlanta, assigned to the fraud and public corruption section, and also an associate independent counsel, investigating fraud and abuse in the Department of Housing and Urban Development. He was honored with the Director’s Award for Superior Performance for his work in connection with the successful prosecution of Walter Leroy Moody Jr., who assassinated an 11th Circuit judge and the head of the Savannah chapter of the NAACP.
A graduate of Harvard Law School and Columbia College, Malcolm began his career as a law clerk to a federal district court judge and a federal appellate court judge, and as an associate at the Atlanta-based law firm of Sutherland, Asbill & Brennan (new Eversheds Sutherland).
Malcolm, who resides in Washington, D.C., serves on the Board of Trustees of the Washington National Opera and is a Senate-confirmed member of the Board of Directors of the Legal Services Corporation, the largest funder of civil legal aid in the United States.
Emanuel S. Heller Professor of Law, University of California at Berkeley; Thomas Smith Senior Research Fellow, The Civitas Institute, University of Texas at Austin
John Yoo is the Emanuel Heller Professor of Law at the University of California at Berkeley. He is also the Thomas Smith Senior Research Fellow, Civitas Institute, at the University of Texas at Austin. He is also a Nonresident Senior Fellow at the American Enterprise Institute.
His most recent book, The Politically Incorrect Guide to the Supreme Court, co-authored with Robert Delahunty, was published in 2023. Professor Yoo’s other books include Defender-in-Chief: Trump’s Fight for Presidential Power; Striking Power: How Cyber, Robots, and Space Weapons Change the Rules for War; Point of Attack: Preventive War, International Law, and Global Welfare; and Crisis and Command: A History of Executive Power from George Washington to George Bush.
He is a co-author of volumes 1 and 2 of R. Rossum, G. Tarr, V. Munoz & J. Yoo American Constitution Law (Routledge, 2026), and a co-editor of the eight-volume series on the 250th anniversary of the American Revolution, We Hold These Truths, with Yuval Levin and Adam White of the American Enterprise Institute.
Professor Yoo has published more than 100 articles in academic journals on subjects including national security, constitutional law, international law, and the Supreme Court. He also regularly contributes to the editorial pages of the Wall Street Journal, New York Times, Washington Post, Los Angeles Times, and National Review, among others.
Professor Yoo has served in all three branches of government. He was an official in the U.S. Department of Justice, where he worked on national security and terrorism issues after the 9/11 attacks. He served as general counsel of the U.S. Senate Judiciary Committee. He has been a law clerk for Supreme Court Justice Clarence Thomas and federal appeals Judge Laurence Silberman. He has been a visiting professor at the University of Texas at Austin’s School of Civic Leadership, Seoul National University, the Interdisciplinary Center Herzliya, Keio University, Trento University, the University of Chicago, and the Free University of Amsterdam.
Professor Yoo supervises the Public Law and Policy Program and the California Constitution Center. He also serves on the boards of Founding Forward, the Washington Legal Foundation, the Pacific Legal Foundation, the Ulysses Grant Institute, the Federalist Society’s Separation of Powers and Federalism Division, the Universidad Cientifica del Sur Law School, and the Asia-Pacific Law Institute at Seoul National University. He is a winner of the Federalist Society’s Paul Bator award and the Heritage Foundation’s Edwin Meese III Originalism Lectureship.
Professor Yoo graduated from Yale Law School and summa cum laude from Harvard College.
Daniel Webster Debate Series: Is It Time to Abolish the Exclusionary Rule?
Richard J. Leon, Tracey Maclin, William T. Pizzi
The Federalist Society's Georgetown Law Chapter'sDaniel Webster Debate Series presents Daniel Webster Debate Series:Is It...
Panel 4: The NetChoice Problem
Jonathan Berry, James M. Burnham, Erin M. Hawley, Casey Mattox, Trevor N. McFadden, Todd J. Zywicki
We know how to think about government coercion. We have ready and familiar frameworks for...
Courthouse Steps Oral Argument: Garland v. Cargill
Stephen P. Halbrook, Robert Leider
Garland v. Cargill concerns whether bump stocks are considered "machineguns" as defined by Title 26...
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John G. Malcolm, John C. Yoo
John Malcolm and John Yoo continue their Teleforum series, joining us to discuss recent events...
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In 2011, the Florida legislature passed the Firearm Owners’ Privacy Act (“the Act”) to protect patients...
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Docs, Glocks, and "Gay Conversion Therapy"
The Eleventh Circuit recently upheld a Florida statute that restricted the freedom of doctors to...