The opinions expressed below are those of Jon Keller, not those of WBZ-TV, CBS News or Paramount, a Skydance Corporation.Massachusetts Congressman Seth Moulton officially announced Wednesday he's running against 79-year-old Sen.

Moulton invoked the Markey's age in his announcement video, arguing that he does not think the senator "should be running for another six year term at 80 years old."

U.S. Rep. Seth Moulton, a moderate Massachusetts Democrat, said Wednesday that he will challenge U.S. Sen. Edward Markey for the Democratic nomination in next year's Senate race, arguing it's time for the party to embrace a new generation of leadership.

HE’S IN — Rep. Seth Moulton made his Senate bid official earlier this morning, setting off one of the biggest tests of Democratic primary voters’ appetite for generational change after the 2024 presidential election.

Rep. Seth Moulton (D-MA) faces a primary challenge from transgender candidate Bethany Andres-Beck, who announced their candidacy in July 2025, amid speculation that Moulton is considering a Senate run against Sen.

During a recent Senate Armed Services Committee hearing, Defense Secretary Pete Hegseth stubbornly refused to answer any questions from Congressman Seth Moulton (D-MA). Moulton called out Hegseth on his juvenile behavior.

Massachusetts Congressman Seth Moulton joined Boston 25 News Now at 3 to discuss the ongoing government shutdown and also told said he continues to mull over running for a Senate seat against longtime incumbent Ed Markey in 2026.