• Nine seats in the United States House of Representatives

In the Democratic primary race for the Class II U.S. Senate seat, incumbent Edward Markey—first elected in 2013—faces challenger Joseph Kennedy III, while the Republican primary features candidates Shiva Ayyadurai and Kevin O’Connor.

Across the nine U.S. House district races in Massachusetts, eight incumbents filed for re-election. Only District 4 incumbent Joseph Kennedy III is not seeking re-election, opting instead to run for the U.S. Senate seat. The open District 4 seat has drawn a field of nine Democratic primary candidates and two Republican primary candidates.

In Districts 1, 2, 3, 5, 7, and 9, the Democratic incumbents are running unopposed. In District 8, the Democratic incumbent faces one challenger. In Districts 2, 5, 6, and 9, the Republican candidates are uncontested, while the Republican primaries in districts 1, 3, 7, and 8 were canceled after no candidate either filed or qualified for the ballot.

The next congressional primaries will be held on September 8 in New Hampshire and Rhode Island.