His lead collapsed from 20 points to just 5 in weeks
In the democratic laboratories of American politics, Massachusetts offers a telling experiment: an incumbent senator's twenty-point advantage has quietly dissolved into a five-point margin, as a younger centrist challenger finds footing among voters once thought safely beyond his reach. Sen. Ed Markey, anchored to the progressive wing by decades of service and powerful endorsements, now faces Rep. Seth Moulton in a race that has become a proxy for the Democratic Party's unresolved argument with itself. With nearly a third of likely primary voters still uncommitted four months before the September vote, the outcome belongs not yet to either man, but to the undecided conscience of the Massachusetts electorate.
- A lead that once felt like a coronation has shrunk to a margin within the poll's own error — Markey's 20-point cushion is now just 5, and the race is genuinely open.
- The demographic fault lines are sharp: Markey holds women and younger voters, Moulton is competitive with men and older ones, and the two coalitions are pulling the party in opposite directions.
- Markey's greatest vulnerability may be hiding inside his own base — women and voters under 50 are the most undecided, leaving his strongest supporters the least committed.
- Moulton's lower unfavorability rating and endorsements from labor and veterans groups signal he has built a credible alternative coalition, not merely a protest candidacy.
- With 29 percent of likely voters still unaligned and four months remaining, the race is less a contest of current standings than a competition for the loyalty of people who haven't yet chosen a side.
The Massachusetts Democratic Senate primary has shifted beneath everyone's feet. A new Emerson College poll released in early May shows Sen. Ed Markey's lead over Rep. Seth Moulton has collapsed from roughly 20 points to just five — 37 to 32 percent — with nearly three in ten likely primary voters still undecided ahead of the September 1 vote.
Markey, 79, has held his Senate seat since 2013 and entered the cycle as the clear frontrunner, backed by Sen. Elizabeth Warren and Rep. Ayanna Pressley. Moulton, 47, has positioned himself as a centrist alternative, drawing support from VoteVets PAC and the Massachusetts Teamsters. The contrast in their coalitions reflects a broader tension within the state party about which direction Democrats should travel.
The polling reveals a striking internal vulnerability for Markey. While he leads among women (37 to 29 percent) and voters under 50, those same groups are the most undecided — women are ten points more likely than men to remain uncommitted, and 39 percent of voters under 50 have yet to choose a candidate. Moulton, meanwhile, is essentially tied with Markey among men and nearly even among older voters, and carries a lower unfavorability rating than the incumbent.
Four months remain before voters decide. If Markey's base consolidates, his demographic advantages could prove durable. But the breadth of indecision among his own supporters — and the genuine momentum Moulton has built — means the outcome is far from settled. What looked like an incumbent's safe passage has become one of the most closely watched Democratic primaries in the country.
The Massachusetts Democratic Senate primary has tightened dramatically. A new Emerson College poll released in early May shows Sen. Ed Markey's once-commanding lead over Rep. Seth Moulton has collapsed to just five points, with the incumbent at 37 percent and the challenger at 32 percent. Nearly three in ten voters remain undecided, a significant bloc that could reshape the race before the September 1 primary.
Markey, 79, has held the Senate seat since 2013 and entered this cycle as the clear frontrunner. Just weeks earlier, a Suffolk University poll conducted with the Boston Globe showed him ahead by 17 points, 47 to 30. That cushion has evaporated. The race has become one of the most closely watched Democratic primaries in the country, pitting the more progressive incumbent against Moulton, a 47-year-old congressman positioned as a centrist alternative.
The two candidates draw support from different corners of the party. Markey has secured endorsements from Sen. Elizabeth Warren and Rep. Ayanna Pressley, anchoring him to the progressive wing. Moulton, meanwhile, has won backing from VoteVets PAC and the Massachusetts Teamsters, groups that reflect his more moderate positioning. The contrast in their coalitions mirrors a broader tension within Massachusetts Democrats about the party's direction.
The polling data reveals stark demographic splits. Markey maintains an edge among women, leading 37 to 29 percent, while men are essentially tied at 38 percent for Moulton and 37 percent for Markey. Among voters under 50, Markey leads 33 to 26 percent. Voters over 50 are nearly split, with Markey at 40 percent and Moulton at 38 percent. Spencer Kimball, the executive director of Emerson College Polling, noted a crucial vulnerability in Markey's coalition: the groups most favorable to him—women and younger voters—are also the most undecided. Women are ten points more likely than men to remain uncommitted, at 33 percent versus 23 percent. Among voters under 50, 39 percent are still undecided compared to just 21 percent of those over 50.
Both candidates face an unfavorability problem when measured against Warren, who remains the state's most popular Democrat. Markey's unfavorable rating matches Warren's at 35 percent, while Moulton's unfavorable rating is lower at 26 percent. The Emerson poll surveyed 451 likely Democratic primary voters on May 3 and 4, with a margin of error of 4.5 percent. Only 2 percent of respondents backed other candidates in the race.
With four months until voters cast ballots, the race remains volatile. Markey's strength among women and young voters could prove decisive if those groups consolidate behind him, but their current indecision suggests the outcome is far from settled. Moulton's gains with men and older voters, combined with his lower unfavorability rating, indicate he has a genuine path to the nomination. The September primary will test whether Markey can hold his base or whether Moulton's momentum carries him to an upset.
Citações Notáveis
Groups favorable to Markey, including women and young voters, are also more undecided than their counterparts— Spencer Kimball, executive director of Emerson College Polling
A Conversa do Hearth Outra perspectiva sobre a história
How much ground did Markey actually lose between these two polls?
In just a few weeks, his lead went from 17 points down to 5. That's not a normal shift in a primary race—it suggests something fundamental changed in how voters see the choice.
What changed?
The polls don't tell us that directly. But Moulton's been making the case that he's a different kind of Democrat, and he's picking up endorsements from labor and veterans groups. Meanwhile, nearly 30 percent of voters are still undecided, which means there's room for movement in either direction.
Who's actually winning with which voters?
Markey holds women and younger voters, but here's the problem—those are his strongest groups and they're also the most undecided. Moulton is competitive with men and older voters. If Markey's base doesn't show up or consolidates late, he could be in real trouble.
Is Markey's unfavorability rating a problem?
It matches Elizabeth Warren's at 35 percent, which is high. But Moulton's is lower at 26 percent. In a primary where voters are still making up their minds, lower unfavorability can be an advantage.
How much time is left?
Four months until September 1. That's enough time for a lot to shift, especially with so many voters still undecided. This race is genuinely competitive now.