Legal Fellow, Center for Constitutional Studies, Cato Institute
Brent Skorup is a legal fellow in the Cato Institute’s Robert A. Levy Center for Constitutional Studies.
Before joining Cato, he was a senior research fellow at the Mercatus Center at the George Mason University. His research areas include free speech, technology law, Fourth Amendment protections, regulation, and property law. Skorup has published pieces in economics and law journals and in popular media, including The Wall Street Journal, The New York Times, Bloomberg Law, Reuters, and Wired. He’s appeared as a TV and radio interview guest for news outlets like C‑SPAN, NPR, CBS News, ABC News, and CNBC Asia.
The Pennsylvania Supreme Court, a dissenting opinion at the Illinois Supreme Court, and the ALI's Restatement of the Law of Property have cited his legal research and he has testified as a technology and legal expert in legislative hearings in several states. Skorup has been appointed to several federal and state advisory bodies and he is currently a member of the Texas Advanced Air Mobility Advisory Committee.
Skorup has a BA in economics from Wheaton College and a law degree from the George Mason University School of Law, where he was articles editor for the Civil Rights Law Journal. He was a legal clerk at the FCC’s wireless bureau and Office of General Counsel and at the Energy and Commerce Committee in the U.S. House of Representatives.
Aviation & Aerospace Team Co-Leader, Adams & Reese
Marc Warren is ranked Band 1 Nationwide in Transportation: Aviation: Regulatory by Chambers USA
Marc is a respected leader in the international aviation bar, and advises many of the world’s leading aviation and aerospace operators and manufacturers. Marc is the co-leader of the Adams & Reese Aviation and Aerospace Practice Team and resident in the firm’s DC and Jacksonville offices.
Marc has deep connections to industry regulators, associations, and leaders, based on decades of providing dependable, authoritative service, with a well-recognized commitment to air safety and the public interest. He has built an unparalleled reputation for wisdom in aviation matters.
Marc’s clients include major airlines, defense, transportation, logistics and infrastructure companies, trade associations, and public venues. Marc steers clients through FAA and Department of Transportation regulatory compliance, government investigations, and enforcement matters.
Marc has deep and extensive experience in aviation matters including those involving U.S. and foreign airlines, aerospace manufacturing, unmanned aircraft systems (UAS), commercial space transportation, advanced air mobility, airports and infrastructure, business aviation, certification and licensing, safety management systems, hazardous materials transport, government contracts, rulemaking and policy, litigation, and government investigations.
Marc’s wide-ranging experience also includes mergers, acquisitions, national security and military law, and international legal and policy issues. His practice also provides full-service, multi-disciplinary capabilities in areas such as antitrust and competition, investigations, crisis response environmental, international, regulatory, government contracts, administrative compliance and enforcement, business transactions and litigation matters, including arbitrations.
A former FAA acting chief counsel and deputy chief counsel, and a senior legal officer for the Army, Marc has technical aviation and senior leader advisory experience.
Marc is helping to shape the future of aviation by developing innovative solutions for drone delivery and urban air mobility systems, and for more effective and efficient use of airspace and airports. He employs novel funding strategies and guides clients in finding proper ways to implement new technologies. Clients turn to Marc to secure and protect government-issued certificates and licenses, relying on him to ensure that their core authorities are maintained.
Before his FAA appointment, Marc served in the US Army Judge Advocate General’s Corps, from which he retired in 2007 after having been selected for promotion to brigadier general.
Partner; Co-Chair, Transportation Practice, DLA Piper
Marc Nichols is co-chair of the DLA Piper Transportation Practice. His practice is primarily focused on a broad range of aviation and aerospace issues, including overseeing litigation responsibilities, enforcement, safety and security matters, regulatory and legislative affairs, employment and labor matters, data and emerging technology, and ethics and compliance issues. Marc was previously Chief Counsel of the Federal Aviation Administration (FAA), appointed by Former President Biden and the US Secretary of Transportation in 2022. In his role as the Chief Legal Officer of the FAA, Marc provided comprehensive legal guidance across all operational facets of the FAA on matters of importance to the national aviation and aerospace sector.
As Chief Counsel, Marc led a team of more than 300 legal professionals located across 13 offices nationwide and oversaw an annual budget exceeding US$65 million. His responsibilities encompassed representing and advising the FAA's various lines of business and staff offices on a broad range of aviation and aerospace issues. Additionally, Marc offered direct counsel to the FAA Administrator, the Deputy Administrator, and the Office of the General Counsel of the US Department of Transportation to ensure the safest and most efficient aerospace system in the world.
CEO, Republic Airways
David Grizzle has been serving as Chief Executive Officer since July 2, 2025 and has served as the Chairman of our Board of Directors since May 2017. Since 2013, Mr. Grizzle has engaged as an aviation consultant through his firm, Dazzle Partners. Mr. Grizzle previously served as Chief Operating Officer of the FAA’s Air Traffic Organization from 2011 to 2013 and as Chief Counsel of the FAA from 2009 to 2011. Prior to his time with the FAA, Mr. Grizzle was with Continental Airlines, Inc. and its affiliates for 22 years, retiring as the Senior Vice President of Customer Experience. In 2004, Mr. Grizzle served for 14 months with the U.S. Department of State in Kabul, Afghanistan as Attaché, Senior Advisor and Coordinator for Transportation and Infrastructure.
Legal Fellow, Center for Constitutional Studies, Cato Institute
Brent Skorup is a legal fellow in the Cato Institute’s Robert A. Levy Center for Constitutional Studies.
Before joining Cato, he was a senior research fellow at the Mercatus Center at the George Mason University. His research areas include free speech, technology law, Fourth Amendment protections, regulation, and property law. Skorup has published pieces in economics and law journals and in popular media, including The Wall Street Journal, The New York Times, Bloomberg Law, Reuters, and Wired. He’s appeared as a TV and radio interview guest for news outlets like C‑SPAN, NPR, CBS News, ABC News, and CNBC Asia.
The Pennsylvania Supreme Court, a dissenting opinion at the Illinois Supreme Court, and the ALI's Restatement of the Law of Property have cited his legal research and he has testified as a technology and legal expert in legislative hearings in several states. Skorup has been appointed to several federal and state advisory bodies and he is currently a member of the Texas Advanced Air Mobility Advisory Committee.
Skorup has a BA in economics from Wheaton College and a law degree from the George Mason University School of Law, where he was articles editor for the Civil Rights Law Journal. He was a legal clerk at the FCC’s wireless bureau and Office of General Counsel and at the Energy and Commerce Committee in the U.S. House of Representatives.
Of Counsel, GrayRobinson
Charlie Trippe practiced civil litigation for the 14 years between 1980 and 1994, most of that with Jones Day, where he was a partner in the New York office. He was the chief litigation counsel of CSX Transportation, Inc., one of the country’s largest freight railroads, from 1994 through 2001. He returned to private practice in Jacksonville in 2001, continuing to practice in the area of civil litigation. He also served as General Counsel to both the Governor of Florida (2010-2011) and the Attorney General of Florida (2020-2022), and as the Chief Counsel of the Federal Aviation Administration (2017-2019). Since 2025 he has been Of Counsel to the Florida firm of GrayRobinson. He is a Florida Supreme Court Certified Circuit Civil Mediator, as well as an experienced arbitrator.
Former Chief Counsel, Federal Aviation Administration
Reggie Govan is former Chief Counsel of the Federal Aviation Administration’s (FAA). The Office of the Chief Counsel provides legal advice in support of the FAA Administrator and all aspects of agency operations at headquarters, regions, and centers and works closely with the Department of Transportation’s Office of General Counsel on issues of national significance to the aviation industry.
Mr. Govan previously served as a corporate counsel, litigator, and legislative counsel. Prior to joining the FAA, he served as Managing Associate General Counsel of Freddie Mac. He also served as Counsel to Chairmen Augustus H. Hawkins and William D. Ford of the United States (U.S.) House of Representatives Committee on Education and Labor, and as Counsel to the then-Chairman (now Vice President) Joseph R. Biden of the U.S. Senate Committee on the Judiciary. His litigation experience includes service as an Assistant District Attorney in Manhattan and as plaintiffs’ counsel in federal civil rights litigation, including school desegregation and voting rights cases.
After acquiring a Bachelor’s degree in Economics and Philosophy from Carnegie-Mellon University and a Juris Doctor from the University of Pennsylvania Law School, he clerked for the Honorable Nathaniel Jones of U.S. Court of Appeals for Sixth Circuit.
Mr. Govan is the author of several professional journal and law review articles. He lives in the District of Columbia.
Partner, Earth & Water Law
Susan Bodine is a partner at Earth & Water Law.
Susan Bodine is a former Assistant Administrator for EPA’s Office of Enforcement and Compliance Assurance (OECA). Prior to this position, Susan served as Chief Counsel for the Senate Committee on Environment and Public Works and previously worked for the House Committee on Transportation and Infrastructure.
This is Susan’s second position at EPA, having served as Assistant Administrator for the Office of Solid Waste and Emergency Response (now the Office of Land and Emergency Management) from 2006 to 2009.
Susan has also practiced environmental law at Covington and Burling LLP and at Barnes and Thornburg LLP.
Susan is a graduate of Princeton University and the University of Pennsylvania School of Law.
Former Attorney General, State of Arizona
Mark Brnovich served as Arizona's 26th Attorney General from 2015 to 2023. He was first inaugurated in 2015, and again in 2019 after winning re-election. Mark has spent most of his professional life serving as a prosecutor at the local, state, and federal levels. Mark met his wife Susan while they both worked as prosecutors for the Maricopa County Attorney's office. Mark worked in the Gang/Repeat Offender Unit and prosecuted many difficult and high profile cases from 1992 to 1998. He then went on to work as an Assistant Attorney General with the Arizona Attorney General's Office from 1998 to 2003, where he developed an expertise in gambling law. Brnovich later went on to serve as an Assistant United States Attorney for the District of Arizona where he prosecuted public integrity crimes, as well as crimes occurring in Indian Country.
Brnovich has also been a Judge Pro Tem of Maricopa County Superior Court, a Command Staff Judge Advocate in the U.S. Army National Guard, the Director for Constitutional Government at the Goldwater Institute, and the Director of the Arizona Department of Gaming, a law enforcement agency that investigates illegal gambling activity, as well as working with tribal regulators to ensure the integrity of tribal gaming.
Brnovich is known for restoring public confidence in the office of "Arizona's Top Cop" and for assembling some of the nation's most talented public servants for his administration. Mark argued at the United States Supreme Court in defense of the "one-person, one-vote" principle, was featured on 60 Minutes in defense of capital punishment, and has initiated national public education efforts to combat human sex trafficking.
Brnovich has been recognized by the National Federation of Independent Business as a "Champion of Small Business." and was elected by his bi-partisan colleagues to serve as the Chairman of the Conference of Western Attorneys General.
Mark's wife Susan was recently appointed by the United States Senate to serve as a U.S. District Judge for the District of Arizona. He has two teenage daughters and lives in Phoenix.
Chairman, Project 21 National Advisory Board, National Center for Public Policy Research
Horace Cooper is a senior fellow with the National Center for Public Policy Research, chairman of the Project 21 National Advisory Board and a legal commentator.
Horace averages over 400 talk radio appearances per year representing the National Center and Project 21, in addition to regular television appearances and interviews by the print media.
Horace taught constitutional law at George Mason University in Virginia and was a senior counsel to U.S. House Majority Leader Dick Armey.
Principal, Beveridge & Diamond, PC
John offers clients the benefit of decades of experience as a top environmental lawyer, a leader of major bar and environmental organizations, and a distinguished military career.
John provides strategic counsel on high-stakes environmental and natural resources litigation, civil and criminal enforcement, and compliance. Working with clients makes the practice of law worthy and valuable to him as they advance strategic needs while protecting human health and the environment.
For more than two decades, John served as a senior leader on environment and natural resource matters at the United States Department of Justice (DOJ), where he supervised some of the department’s most significant litigation, including the Exxon Valdez oil spill, Love Canal, and Bunker Hill litigation. As the Senate-confirmed, Assistant Attorney General, ENRD, John worked on the most high-profile environment cases, and personally negotiated the multi-billion dollar resolutions of the Deepwater Horizon oil spill and the Volkswagen emissions scandal. These cases required a great deal of coordination, expert assistance, and sophisticated management of numerous players to reach successful outcomes. This experience has given John insight into the workings of large corporations, as well as into the challenges that major companies face in lawsuits.
As the former President of the Environmental Law Institute, the former Chair of the American Bar Association (ABA) Section on Environment, Energy, and Natural Resources, and the immediate past President of the American College of Environmental Lawyers, John has led each of the premier environmental organizations in the United States. In addition, he was the first government attorney to be elected and serve as the President of the District of Columbia Bar, now the largest bar in the nation.
Professional Background
John’s leadership is a defining characteristic of his long and distinguished legal career. Before joining the DOJ, John was the Chief Legislative Counsel of the U.S. Army. After graduating from the United States Military Academy at West Point, John served in Airborne, Ranger, and Special Forces units in Germany and Vietnam. His subsequent military assignments include as a criminal prosecutor in Germany and civil trial lawyer in the Pentagon; Chief of Litigation Branch, Europe; General Counsel, Defense Nuclear Agency; Staff Judge Advocate in Germany; and Director of Administrative and Civil Law, Judge Advocate General’s School, Charlottesville, Virginia. His military education includes being a Fellow, Army War College, and the Command and General Staff College. He is a graduate of the University of Santa Clara Law school (summa cum laude) and the University of Virginia (MA with honors).
John’s awards for government and military service include the President Rank Award from three different Presidents, the Bronze Star, Legion of Merit, Defense Meritorious Service Medal, Air Medal with Oak Leaf Clusters, and the Vietnamese Cross of Gallantry with Silver Star.
Partner, Arnold & Porter
Brian Israel is Chair Arnold & Porter's Environmental Practice Group, as well as co-lead of the firm’s Environmental, Social and Corporate Governance (ESG) working group. Mr. Israel's practice focuses broadly on environmental litigation and counseling—including climate-related issues—and he is one of the nation's leading lawyers for Natural Resource Damages (NRD) claims. Over the course of his career, Mr. Israel has successfully resolved or litigated over one hundred environmental matters. Among other areas, Mr. Israel specializes in cases brought under federal and state environmental laws related to contaminated sites, including toxic tort lawsuits. Since 2010, Mr. Israel has been lead counsel to BP in relation to Deepwater Horizon NRD claims, and was also one of the trial attorneys at the Deepwater Horizon Clean Water Act (CWA) penalty trial. Mr. Israel represents multiple Fortune 500 companies in some of the largest and most complex environmental matters across the country.
Prior to joining the firm, Mr. Israel was an Honors Trial Attorney in the Environmental Enforcement Section of the US Department of Justice (DOJ). While at the DOJ, he handled several high-profile cases, including the largest NRD trial at the time. Additionally, Mr. Israel was awarded the Distinguished Service Award for his accomplishments in a Clean Air Act jury trial during his time at the DOJ. He also litigated claims on behalf of the US Environmental Protection Agency pursuant to the Clean Water Act; the Resource Conservation and Recovery Act (RCRA); and the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA).
Mr. Israel has spoken and written extensively about environmental law issues. He is a principal author of "Natural Resource Damages: A Guide to Litigating and Resolving NRD Cases," (ABA, 2019). For the last 15 years, Mr. Israel has maintained and regularly updated the State-by-State Guide to NRD Programs in All 50 States and Puerto Rico. Mr. Israel hosts and chairs the annual Advanced Conference on Litigating Natural Resource Damages (sponsored by Law Seminars International). He is the author of the "Natural Resource Damages" chapter in the Environmental Law Practice Guide (Gerrard, ed.). Mr. Israel has published on many other environmental law topics including environmental enforcement, corporate liability, regulatory reform, trial strategy, and Superfund. Mr. Israel's student note, "An Environmental Justice Critique of Risk Assessment," is published in the NYU Environmental Law Journal.
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.
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.
Aviation Policy Episode 3: Air Traffic Control
Brent Skorup, Marc Warren, Marc Nichols, David Grizzle
In this final episode of the Regulatory Transparency Project’s aviation policy podcast series, host Brent...
Aviation Policy Episode 1: Drones & Federalism
Brent Skorup, Charles M. Trippe, Reggie Govan
Brent Skorup (Cato Institute) is joined by Reggie Govan (Former Chief Counsel, Federal Aviation Administration)...
Environmental Justice, Civil Rights, and the Rule of Law
Susan P. Bodine, Mark Brnovich, Horace Cooper, John C. Cruden, Brian D. Israel
This panel will evaluate efforts in the Biden administration, building upon executive actions dating back...
Topics
Don’t Fear Volatility in Cryptocurrency Prices; Fear Regulations that Will Harm America’s Crypto Lead
After a massive runup since the beginning of the year, the cryptocurrency market finally experienced...
Morally Innocent, Legally Guilty: The Case for Mens Rea Reform
John G. Malcolm
Note from the Editor: This article discusses the concept of mens rea, argues that too...
Should Federal Wetlands Regulation Give Way to State and Private Initiatives?
Jonathan H. Adler
It is hard for many to believe that Maryland developer James J. Wilson could be...