High Quality Content by WIKIPEDIA articles! Joseph McKenna (August 10, 1843 – November 21, 1926) was an American politician who served in all three branches of the U.S. federal government, as a member of the U.S. House of Representatives, as U.S. Attorney General and as an Associate Justice of the Supreme Court. He is one of a small number of members of the House of Representatives who have subsequently served on the Supreme Court.