General Counsel, xAI and X
Partner, Stone Pigman Walther Wittmann LLC
Mr. Thomson concentrates his practice in white collar criminal defense, government investigations, and corporate compliance. He has tried over 50 criminal trials to verdict in federal and state courts, and has experience in appellate litigation. His practice also includes civil litigation and information security. Prior to joining Stone Pigman, Mr. Thomson had a 23 year career as a federal prosecutor with the U.S. Department of Justice. He served on special assignment with the National Security Agency, where he worked on matters involving information assurance and intelligence collection.
Prior to private practice, Mr. Thomson was recognized numerous times by government agencies, including a Special Commendation Award given by the U.S. Attorney General for completing the Justice Department's Leadership Excellence and Achievement Program; Special Commendation by FBI Director for outstanding performance for successful corruption prosecution after Hurricane Katrina; Special Award from the U.S. Postal Service for prosecution of corrupt employee; Special Award by New Orleans Police Department, ATF and U.S. Department of Justice for his contributions to Project Exile; and Special Awards for Outstanding Contributions to Drug Law Enforcement from the Drug Enforcement Administration.
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.
Assistant Attorney General, Civil Division, United States Department of Justice
Brett A. Shumate was sworn in as the Civil Division’s 36th Assistant Attorney General on June 11, 2025. He previously served in the Civil Division from 2017 to 2019 as the Deputy Assistant Attorney General for the Federal Programs Branch. Prior to rejoining the Department, Mr. Shumate was a partner at Jones Day in Washington, D.C.
Mr. Shumate clerked for Judge Edith H. Jones on the United States Court of Appeals for the Fifth Circuit. He graduated from Wake Forest University School of Law and Furman University.
Partner, Wiley Rein, LLP
Megan L. Brown is a partner at Wiley Rein LLP. She has significant litigation, appellate and regulatory experience before state and federal courts and agencies.
Ms. Brown helps businesses respond to federal, state and local regulation and investigations raising administrative law, statutory interpretation, and constitutional issues, including the First Amendment.
General Counsel and Corporate Secretary, Citigroup
Brent McIntosh joined Citi as General Counsel and Corporate Secretary in October 2021. Brent leads Citi's global legal team, including Citi security and investigative services, and oversees Citi’s independent compliance risk management function.
Brent served as Under Secretary of the Treasury for International Affairs from 2019 to 2021. He led the Treasury Department’s engagement in the G7 and G20, represented the United States on the Financial Stability Board, and managed U.S. participation at the IMF and World Bank. He oversaw Treasury’s international economic and financial policy work, including significant engagements on investment security and regulation of digital currencies. During 2020, he coordinated initiatives to alleviate the COVID-19 pandemic’s economic consequences.
From 2017 to 2019, Brent served as Treasury’s General Counsel, leading the department’s approximately 2,000 lawyers and spearheading its regulatory reform efforts. Prior to that, he was a partner in the law firm of Sullivan & Cromwell, where his practice focused on complex disputes involving financial institutions and multinational corporations.
Brent served in the White House from 2006 until 2009, first as Associate Counsel to the President and then as Deputy Assistant to the President and Deputy Staff Secretary. Before that, he was a Deputy Assistant Attorney General at the Justice Department, where his work focused on national security matters.
A Michigan native, Brent holds an A.B. in economics and political science from the University of Michigan and a J.D. from Yale Law School. Following law school, he was a law clerk to two federal appellate judges, Dennis Jacobs of the Second Circuit and Laurence H. Silberman of the D.C. Circuit. Brent serves on the Board of Directors of the Alexander Hamilton Society, the Board of Advisors for the National Security Institute at George Mason University’s Antonin Scalia Law School, and the Advisory Council of the Official Monetary and Financial Institutions Forum. He is a member of the Council on Foreign Relations, where he previously served as an Adjunct Senior Fellow for International Economics and Finance, as well as the Bretton Woods Committee and the International Institute for Strategic Studies.
Rebecca Seidel currently resides in Louisville, Kentucky and in 2023 recently joined the state office of Senator Rand Paul, M.D, as Grant Coordinator. In this position, Ms. Seidel tracks grant opportunities, both public and private, that could aid constituents and works to provide support and helpful information to those in need who can benefit.
Prior to moving to Kentucky in 2016 Rebecca Seidel was General Counsel of the Senate Commerce Committee in Washington D.C. In that role, Ms. Seidel handled cybersecurity, privacy, data security, vehicle safety and consumer protections issues. She also oversaw committee investigations and oversight of the executive branch and private sector companies. Prior to joining the Commerce Committee, Ms. Seidel held positions in the Senate, the Executive Branch and in private sector law practice.
Immediately prior to the Commerce Committee, Ms. Seidel was counsel to the Senate Impeachment Trial Committee, formed for the trial of Judge G. Thomas Porteous. Before that Ms. Seidel was Deputy Assistant Attorney General for Legislative Affairs at the Department of Justice. Previously she served as senior counsel on the Senate Judiciary Committee handling legal reform issues including asbestos and class action. Prior to that she started her government career as counsel to then Senator George V. Voinovich.
Ms. Seidel’s time in private law practice was spent in the Boston, Massachusetts area where she was a litigator for five years practicing federal and state civil litigation defense in complex product liability, premises liability, liquor liability, and ERISA cases. She received her undergraduate degree from the University of Notre Dame and her law degree from the University of Dayton.
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