Massachusetts held its statewide primary on September 1, 2020. There were 200 state legislative seats on the ballot, 40 in the state Senate and 160 in the state House. Candidates competed to advance to the general election on November 3, 2020.

As of September 3, several races were still too close to call. In the state House, 145 incumbents filed for re-election, and all 40 incumbents in the state Senate filed for re-election. At least two incumbents were defeated in the primary across the two chambers. In the 17th Middlesex District of the state House, Vanna Howard defeated incumbent David Nangle and Lisa Arnold in the Democratic primary. In the state Senate’s Hampden District, Adam Gomez defeated incumbent James Welch in the Democratic primary. Neither Howard nor Gomez face Republican opposition in the general election.

Massachusetts has a divided government in which no political party holds a state government trifecta. A trifecta exists when a political party holds both the governor’s office and majorities in both state legislative chambers. Although Democrats hold a majority in both chambers, Massachusetts elected Republican Gov. Charlie Baker in 2014.

The next two primaries in the 2020 election cycle are on September 8 in New Hampshire and Rhode Island.