Ed Markey, 80, leads Seth Moulton by double digits. Will Markey top 55% in the Sept 1 Massachusetts Senate primary?
53% of users predicted YES โ community got this one right.
Sen. Ed Markey, 80, defeated Rep. Seth Moulton in the Massachusetts Democratic Senate primary on September 1, 2026, winning about 65 percent of the vote to Moulton's 35 percent with the large majority of ballots counted, a margin of roughly 30 points. The Associated Press called the race shortly after 8:30 p.m. ET on primary night. Moulton, who is in his 40s, had challenged Markey by arguing the incumbent, seeking a third full term, represented an aging Democratic establishment out of step with the party's younger voters, a message that gained little traction against Markey's support from the state's progressive base and organized labor. Markey's showing comfortably cleared the 55 percent threshold in the question, and he becomes the heavy favorite in the general election in the heavily Democratic state. The result continued a pattern in 2026 primaries in which incumbent Democrats facing generational-change challenges have generally prevailed by wide margins. The community predicted this correctly but narrowly, with only 53 percent forecasting Markey would top 55 percent, understating the eventual size of his win.