Sen. Ed Markey walked out of Worcester with the Massachusetts Democratic Party’s official endorsement on Saturday, after winning a commanding share of delegates at the state convention while his primary challenger, Rep. Seth Moulton, secured enough support to stay on the ballot. According to The Boston Globe, paper ballots cast by more than 4,000 delegates at the DCU Center broke roughly 73 percent to 27 percent for Markey, a margin that handed him the party’s formal backing as both campaigns pivot toward a September primary fight.
Convention Vote And What It Means
Under Massachusetts Democratic Party rules, statewide candidates must win at least 15 percent of delegate support at the convention to make the primary ballot. Moulton cleared that bar in Worcester, ensuring his name will appear alongside Markey’s on Sept. 1. The Massachusetts Democratic Party details the convention schedule, rules and endorsement process that led to Saturday’s roll call.
Debates, Messaging And Next Steps
The campaigns have agreed to a single primary debate later this summer, though Moulton has been pushing for a fuller slate of head-to-head forums. As reported by AP, both sides committed to one debate, while Moulton’s team separately pointed to an August 20 forum co-hosted by The Boston Globe, WCVB and WBUR in a campaign press release. Moulton campaign materials argued that the late date is not enough and urged more chances for voters to see the candidates side by side.
On the convention stage, Markey used his nominating speech to frame the primary as a clash over priorities and directly criticized Moulton’s past remarks about transgender youth. Moulton told delegates he was “proud of the support” he won in the hall and cast his challenge as a push for generational change. Coverage of the proceedings also noted remarks from other party leaders, including Senator Elizabeth Warren, and the endorsement of several statewide incumbents, as outlined by The Boston Globe.
The endorsement sets the tone but does not settle the race. Democratic voters will make the final call in the Tuesday, Sept. 1, 2026 primary, and both campaigns are already shifting resources toward voter outreach, town halls and that one scheduled debate later this summer. For on-the-ground coverage of how the contest is taking shape, reporting from the Boston Herald and the outlets above continues to track the Senate race heading into the fall.
