Richard Mentor Johnson (October 17, 1780 – November 19, 1850) was an American lawyer, military officer, and politician who served as the ninth vice president of the United States from 1837 to 1841 under President Martin Van Buren. He is the only vice president elected by the United States Senate under the provisions of the Twelfth Amendment. Johnson also represented Kentucky in the U.S. House of Representatives and Senate. He began and ended his political career in the Kentucky House of Representatives.
After two years in the Kentucky House, Johnson was elected to the U.S. House in 1806. He allied with fellow Kentuckian Henry Clay as a member of the War Hawks faction that favored war with Britain in 1812. At the outset of the War of 1812, Johnson was commissioned a colonel in the Kentucky Militia and commanded a regiment of mounted volunteers from 1812 to 1813. He and his brother James served under William Henry Harrison in Upper Canada. Johnson led troops in the Battle of the Thames.
Many reported that he personally killed the Shawnee chief Tecumseh, a claim that he later used to his political advantage. After the war, Johnson returned to the House of Representatives. The state legislature appointed him to the Senate in 1819 to fill the seat vacated by John J. Crittenden. With his increasing prominence, Johnson was criticized for his interracial relationship with Julia Chinn, a mixed-race slave who was classified as octoroon (or seven-eighths white).