 He was a delegate to the Democratic National Conventions in 1932, 1936, 1940, and 1944.Sheridan was elected as a Democrat to the 76th Congress to fill the vacancy caused by the death of J. Burrwood Daly, and was reelected to the Seventy-seventh, Seventy-eighth, and Seventy-ninth Congresses.He was not a candidate for reelection in 1946.