 Incumbent Democratic Congressman James F. Byrnes of the 2nd congressional district, in office since 1911, was unopposed in his bid for re-election.Incumbent Democratic Congressman Frederick H. Dominick of the 3rd congressional district, in office since 1917, won the Democratic primary and was unopposed in the general election.Incumbent Democratic Congressman John J. McSwain of the 4th congressional district, in office since 1921, defeated Republican challenger M.P.