Massachusetts held its state primary elections with various competitive races, including the Republican primary for the U.S. Senate seat to challenge incumbent Democrat Sen. Elizabeth Warren. Candidates Robert Antonellis, Ian Cain, and John Deaton are vying for this spot. Other notable races include the Republican primary in U.S. District 8 to challenge Rep. Stephen Lynch and the Democratic primaries for the 9th Middlesex District and Barnstable, Dukes, and Nantucket District. Incumbent Rep. Jack Patrick Lewis faced a challenge in Framingham's 7th Middlesex District, and in Springfield, state Rep. Bud Williams is being challenged by teacher Johnnie McKnight. Additionally, the 13th Norfolk District race features three Democrats vying to replace retiring state Rep. Denise Garlick.