 He moved to Baltimore, Maryland, in 1850.May was elected as a Democrat to the Thirty-third Congress (March 4, 1853 – March 3, 1855).He was an unsuccessful candidate for reelection in 1854 to the Thirty-fourth Congress, but was elected as a Unionist to the Thirty-seventh Congress (March 4, 1861 – March 3, 1863).