Assistant Attorney General, Environment and Natural Resources Division, U.S. Department of Justice
Biography
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.
Milton R. Underwood Chair in Free Enterprise, Vanderbilt University Law School
Biography
Brian Fitzpatrick is the Milton R. Underwood Chair in Free Enterprise and Professor of Law at Vanderbilt Law School, where his research focuses on class action litigation, federal courts, judicial selection, and constitutional law. He is best known for his empirical studies of class action settlements as well as his book The Conservative Case for Class Actions (University of Chicago Press, 2019). Professor Fitzpatrick joined Vanderbilt's law faculty in 2007 after serving as the John M. Olin Fellow at New York University School of Law. He graduated first in his class from Harvard Law School and went on to clerk for Judge Diarmuid O'Scannlain on the U.S. Court of Appeals for the Ninth Circuit and Justice Antonin Scalia on the U.S. Supreme Court. After his clerkships, Professor Fitzpatrick practiced commercial and appellate litigation for several years at Sidley Austin in Washington, D.C., and served as Special Counsel for Supreme Court Nominations to U.S. Senator John Cornyn. Before earning his law degree, Fitzpatrick graduated summa cum laude with a bachelor's of science in chemical engineering from the University of Notre Dame. He has received the Hall-Hartman Outstanding Professor Award, which recognizes excellence in classroom teaching, for his Civil Procedure and Federal Courts courses.
Professor of Law, University of Michigan Law School
Biography
Christopher J. Walker is a Professor of Law at the University of Michigan. Prior to joining Michigan law faculty in 2022, he spent a decade teaching at The Ohio State University Moritz College of Law. He previously clerked for Justice Anthony Kennedy of the U.S. Supreme Court, worked on the Civil Appellate Staff at the U.S. Department of Justice, and served on the Senate Judiciary Committee staff for the Gorsuch Supreme Court confirmation. Professor Walker’s research focuses on administrative law, regulation, and law and policy at the agency level. Outside the law school, he chaired the American Bar Association’s Section of Administrative Law and Regulatory Practice in 2020-21 and served as one of forty Public Members of the Administrative Conference of the United States from 2016-2022, and he continues to serve in both organizations in various capacities. He also works of counsel at the U.S. Chamber Litigation Center. In 2022, he received the Federalist Society’s Joseph Story Award.
Professor Derek Muller is a nationally-recognized scholar in the field of election law. His research focuses on the role of states in the administration of federal elections, the constitutional contours of voting rights and election administration, the limits of judicial power in the domain of elections, and the Electoral College.
He has published more than two dozen academic works, and his op-eds have appeared in the New York Times, the Los Angeles Times, and the Wall Street Journal. He has testified before Congress, and he is a contributor at the Election Law Blog. He is a co-author on a Federal Courts casebook published by Carolina Academic Press. He is also the co-reporter on a new Restatement of the Law, Election Litigation, an effort led by the American Law Institute.
Professor Muller teaches Election Law, Civil Procedure, and Evidence.
Judge, United States Court of Appeals, Ninth Circuit
Biography
Judge Nelson was confirmed to the Ninth Circuit in October 2018,as the youngest Circuit Judge to serve from Idaho and he has chambers in his hometown of Idaho Falls.Prior to his confirmation, Judge Nelson served for nine years as General Counsel of Idaho Falls-based Melaleuca, Inc., a consumer goods company. He previously worked in Washington, DC, where he served in all three branches of the federal government, including as Special Counsel for Supreme Court nominations to the Ranking Member of the Senate Judiciary Committee; Deputy General Counsel to the White House Office of Management and Budget; Deputy Assistant Attorney General in the Environment and Natural Resources Division of the United States Department of Justice; and a law clerk to Judge Henderson of the United States Court of Appeals for the D.C. Circuit. He has argued in most of the federal courts of appeals and worked on dozens of Supreme Court briefs. He started in the Washington, DC office of Sidley Austin as an appellate lawyer, after clerking for Judges Mosk and Brower of the Iran-U.S. Claims Tribunal at The Hague, and fornow-Judge Tom Griffith, then-Senate Legal Counsel, during the impeachment trial of President Clinton. Judge Nelson earned his B.A. from Brigham Young University and his J.D., with honors, from BYU Law School. Judge Nelson has been a member of the Federalist Society since 1998.
Tazewell Taylor Professor of Law and William H. Cabell Research Professor, William & Mary Law School
Biography
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.