 He worked in the landscape construction business from 1919 until 1942, during which time he was a member of the Delaware Athletic Commission from 1931 until 1934, and a commissioner on the Delaware Emergency Relief Commission in 1934.Stewart was elected to the U.S. House of Representatives in 1934, defeating Democrat John C. Hazzard.He served in the Republican minority in the 74th Congress, and lost his bid for a second term in 1936 to Democrat, William F. Allen.