The owner of an insurance business, Bender served in the Ohio State Senate from 1920 to 1930. He ran unsuccessfully for the United States House of Representatives in 1930 and each of the three succeeding elections, finally winning on his fifth try in 1938. He spent five terms in office before losing a bid for a fifth term in 1948. Bender won back the seat two years later. He won re-election in 1952, but resigned in early 1954 after winning a special election to fill the open seat created by the death of Robert A. Taft. He sought re-election in 1956, but lost to Frank Lausche.