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.