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Thomas C. O'Halleran is a Representative from Arizona. Born in Chicago, Illinois in 1946, he attended Lewis University from 1965-1966 and DePaul University from 1991-1992. He worked as a police officer in Chicago from 1966-1979, a bond trader, business owner, a member of the Arizona state house of representatives from 2001-2007, and a member of the Arizona state senate from 2007-2009. He was elected as a Democrat to the 115th Congress (January 3, 2017-present).