 He also served as a member of the New Hampshire House of Representatives in 1816.Elected as a Democratic-Republican to the Fifteenth Congress and reelected to the Sixteenth Congress, Clagett served as a United States Representative from (March 4, 1817 – March 3, 1821).After leaving Congress, he was appointed judge of probate on August 5, 1823, and held the office until his death.