(Kenny Holston | The New York Times) The U.S. Supreme Court building in Washington, May 9, 2024. In a 6-3 ruling, the Supreme Court on June 28 reduced the authority of executive agencies, sweeping aside a longstanding legal precedent that required courts to defer to the expertise of federal administrators in carrying out laws passed by Congress. The precedent, Chevron v. Natural Resources Defense Council, is one of the most cited in American law.