Results General election Auditor Incumbent Auditor Thaddeus M. Buczko was unopposed in the Democratic primary and the general election. General election United States House of Representatives All of Massachusetts' twelve seats in the United States House of Representatives were up for election in 2018. Ten seats were won by candidates seeking re-election. The 3rd District seat was won by Joseph D. Early, who succeeded retiring Democrat Harold Donohue. The 5th District seat was won by Democrat Paul Tsongas, who defeated incumbent Republican Paul W. Cronin. References Massachusetts