Seth Moulton

Sen. Ed Markey, D-Mass., and Rep. Seth Moulton, D-Mass., will both be on the Massachusetts September primary ballot for the U.S. Senate race.

At the Massachusetts Democratic Party’s 2026 Nominating Convention May 30, Markey received 70.94% of the delegate vote and Moulton received 27.06%. Candidates need at least 15% to get on the statewide ballot.

Markey will receive the party’s endorsement after getting a majority of the delegate vote.

“Honored to receive the endorsement of the Massachusetts Democratic Party and humbled by this resounding win,” Markey said in a post on Instagram. “Onwards in the fight to stop Trump and reclaim our democracy.”

But it was also a strong weekend for Moulton. Mary Anne Marsh, a Democratic political analyst, had said in an interview before the convention that as recently as the spring, there were questions as to whether Moulton would be able to get the 15%. The representative, who is challenging Markey in a bid for generational change, has largely been trailing the senator in the polls.

“At the beginning of this race, the ‘party insider’ narrative was that Seth couldn’t take on an entrenched establishment incumbent who’s spent 50 years in office,” said Taylor Hebble, campaign spokesperson, in a statement. “Today, we proved them wrong. It’s undeniable: Massachusetts wants a choice this September, and our momentum is only growing."

Marsh said the result is a testament to Moulton's effective recruitment of delegates. And if a credible poll or two comes out showing him within single digits of Markey, she said, “then we’ve got a race.”

Who else will be on the Democratic primary ballot?

At the convention, which took place at the DCU Center in Worcester May 29 to 30, delegates also voted on Democratic candidates for governor, lieutenant governor, attorney general, secretary of state, treasurer and auditor.

However, all of these offices featured incumbents who are unopposed.

So expect to see these familiar faces on the Democratic primary ballot this Sept. 1: