Markey defeats Moulton in Massachusetts Senate primary, bucking generational trend

Sen. Ed Markey, 80, easily defeated Rep. Seth Moulton, 47, in the Massachusetts Democratic Senate primary on Tuesday, according to the Associated Press, inverting a national pattern in which younger Democratic challengers have unseated longer-serving incumbents in 2026.

Markey's victory tests whether experience and ideological alignment can outweigh generational change as motivators for Democratic primary voters. The race framed a clash between a decades-long progressive incumbent and a moderate younger challenger who called for fresh leadership.

Markey has held elected office in Massachusetts since 1976, serving in the House from that year until 2013 and in the Senate since his election in 2013, according to PBS NewsHour. Moulton, a Marine Corps veteran who enlisted after the September 11, 2001 attacks and served four tours in Iraq, was first elected to Massachusetts' 6th Congressional District in 2014. He launched a 2020 presidential campaign but withdrew after a short period.

Markey championed proposals for a universal single-payer healthcare system and sweeping clean energy policies known as the "Green New Deal," per The Guardian's reporting. He pointed to his role in the 2022 climate bill and called for an end to the war in Iran to lower energy costs. Moulton has not endorsed single-payer healthcare, instead calling for universal healthcare coverage, per The Guardian.

During the campaign, Moulton argued that Markey's 50 years in office raised questions about what he would accomplish in the next six years. "People ought to ask, what are you going to accomplish in the next six years that you haven't been able to accomplish in the last 50?" Moulton said, according to PBS NewsHour. Moulton criticized Markey for spending less time holding town halls and candidate forums than he did. In an August debate, per The Guardian, Markey stated: "I think everyone watching this debate can see that I'm more energized than I've ever been before in my life. I am crisscrossing the state. I'm fighting for families."

Markey called Moulton's positions out of step with Massachusetts voters. Markey sharply criticized Moulton for opposing "Medicare for All", though Moulton has called for universal healthcare, per PBS NewsHour. Markey said of Moulton: "He has a backwards-looking political agenda." The senator also pointed to Moulton's 2024 comments opposing transgender girls in sports as evidence of alignment with Trump talking points. Moulton apologized for those remarks before the primary, saying it was not his intention to hurt the transgender community and stressing his support for other transgender rights bills. During an August debate, Moulton said: "If you're in the trans community or you're a trans kid feeling the weight of the Trump administration and the Supreme Court, you matter. You're valued, and I will always have your back."

Markey had backing from top congressional progressives, including Vermont independent senator Bernie Sanders and Massachusetts Democratic senator Elizabeth Warren, according to The Guardian. Markey noted his technological limitations in one debate moment: when asked about what AI tools he used, he answered "whatever is inside of my iPhone and my iPad—whatever comes up," per The Guardian. Moulton seized on the comment. "Senator, if you don't even know what you're using on your phone or your iPad, this is why we need a new generation of leaders to regulate these technologies to make sure that they are safe," Moulton responded, according to The Guardian.

Markey is seeking a third six-year term. Massachusetts is heavily Democratic, making him favored to win the general election in November, per The Guardian. Markey will face Republican nominee John Deaton in the fall. The result comes as Democratic voters nationwide have agonized over the age of some lawmakers, a concern amplified by Joe Biden's loss in 2024 and the subsequent defeat of Kamala Harris by Donald Trump. In primaries elsewhere in 2026, according to The Guardian, Democratic voters unseated a handful of long-serving incumbents in favor of younger, progressive challengers who vowed to break from party orthodoxy on issues like Israel support.

Two other Massachusetts Democratic incumbents facing youth challenges showed different outcomes. Rep. Stephen Lynch, 71, who has held the 8th District seat in south Boston since 2001, stressed the value of experience inside Congress and fended off a challenge from 39-year-old lawyer Kyle Roath, who contended it is time to end "wait-your-turn" politics, per PBS NewsHour. Rep. Richard Neal, 77, the dean of the New England House delegation and first elected in 1988, faced a challenge from 39-year-old progressive public school teacher Jesse Whalen, who ran to the left, calling for Medicare for All and questioning whether Neal has done enough to oppose Trump's agenda, per PBS NewsHour. Whalen was recently endorsed by Our Revolution, a progressive organization founded by Bernie Sanders.

Markey's victory echoes his 2020 performance, when he fended off a challenge from Rep. Joe Kennedy III, a younger rival. In 2020, Markey aligned himself with the liberal wing of the Democratic Party to beat back Kennedy's bid. Antoine Hilaire, a 76-year-old Democrat who voted for Markey in Brockton on Tuesday, said being older can be a positive because it offers people experience and wisdom, per PBS NewsHour.