 Elected to Congress in 1930, Andrews served from March 4, 1931 until January 3, 1945 for the 40th District; and from January 3, 1945 to January 3, 1949 for the 42nd District.He was chairman of the United States House Committee on Armed Services, during the 80th United States Congress.He was not a candidate for renomination, due to physicians advising him to take things easier.