John William Warner KBE (born February 18, 1927) is an American Republican politician who served as Secretary of the Navy from 1972 to 1974 and as a five-term United States Senator from Virginia from January 2, 1979, to January 3, 2009. He did not seek reelection in 2008 and has rejoined the law firm of Hogan Lovells, where he worked before joining the United States Department of Defense.