Moulton challenging green champion Ed Markey

By Kelly Garrity | 10/15/2025 06:34 AM EDT

Massachusetts Rep. Seth Moulton announced his campaign with a message of generational change.

Rep. Seth Moulton during a hearing.

Rep. Seth Moulton (D-Mass.) during a hearing on rail safety last year. Samuel Corum/AFP via Getty Images

Another round in the generational fight within the Democratic Party is coming to Massachusetts.

Rep. Seth Moulton will challenge Sen. Ed Markey for his Senate seat in 2026, setting up one of the biggest tests of Democratic voters’ appetite for generational change following the 2024 presidential election.

Moulton, who turns 47 this month, is putting age at the center of his announcement, saying in a campaign video to be released Wednesday that Markey is “a good man” but he should nevertheless move on after decades in Congress.

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“We’re in crisis, and with everything we learned last election, I just don’t believe Senator Markey should be running for another six-year term at 80 years old,” he said in the video announcement. “Even more, I don’t think someone who’s been in Congress for a half-century is the right person to meet this moment and win the future.”

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