Wednesday, September 2, 2026
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Politics

Markey wins Massachusetts Senate Democratic primary over Moulton

Sen. Ed Markey defeated Rep. Seth Moulton by nearly 30 points in the Massachusetts Democratic Senate primary on September 1, 2026.

By Marisol Vega, Political correspondent · Massachusetts · Wednesday, September 2, 2026

BOSTON — Sen. Ed Markey defeated Rep. Seth Moulton in the Massachusetts Democratic Senate primary on Tuesday, securing the nomination for a third full Senate term, according to calls by the Associated Press and Decision Desk HQ.

With approximately 96 percent of ballots counted, Markey received 64.9 percent of the vote to Moulton's 35.1 percent, Time reported. Decision Desk HQ called the race with just 4 percent of votes tallied, at which point Markey led by more than 30 percentage points, according to The Hill.

Moulton, 47, and his allies held a spending advantage in the race, putting $7.1 million into advertising compared to $3.9 million spent by Markey, 80, and his allies, per AdImpact data cited by NBC News. Moulton had argued that Markey should not seek another six-year term at his age and questioned whether "someone who's been in Congress for a half century is the right person to meet this moment," according to UPI. Markey countered that the contest was ideological rather than generational, telling a rally on the eve of the primary that it was about "sending a progressive Democrat to the Senate from Massachusetts," per NBC News.

NPR noted the victory marked the second time Markey had turned back a primary challenge from a significantly younger candidate, having previously defeated Rep. Joe Kennedy III in 2020. Markey is the oldest senator Massachusetts has ever elected and the oldest Senate Democrat seeking reelection this year, per WBUR. He received endorsements from Sens. Elizabeth Warren and Bernie Sanders and Rep. Alexandria Ocasio-Cortez, according to NBC News and WBUR.

In his concession speech, Moulton told supporters he had called Markey to congratulate him and that Markey had his full support as the Democratic nominee, NBC News reported. Markey will face Republican attorney John Deaton in November. Deaton ran unopposed in the GOP primary and previously lost to Sen. Warren in 2024, per The Hill and Axios.

SourcesThe HillWBURBoston HeraldThe Washington Post