Maine Gov. Janet Mills’s sudden exit from the U.S. Senate race on Thursday delivered a stinging rebuke to Senate Democratic leader Chuck Schumer, who had personally recruited the two-term governor to challenge Republican Sen. Susan Collins. But Mills was unable to overcome the fundraising and grassroots momentum of Graham Platner, a 41-year-old oyster farmer with no prior elected office, highlighting a widening rift between the party’s institutional wing and a base that is increasingly demanding generational change and a more combative posture ahead of November’s midterm elections.
“Rank-and-file Democrats don’t want the Democratic Party as we know it,” said Ezra Levin, co-founder of the resistance group Indivisible. “Rank-and-file Democrats want fighters.”
Platner, who is now almost certain to be the Democratic nominee in one of the party’s best pickup opportunities, was backed early by local Indivisible chapters and by Vermont Sen. Bernie Sanders, an independent who caucuses with Democrats. Platner said Friday that his criticisms of the party leadership have not changed, but that he would accept help from the establishment if it was offered. “The fact that we’ve been able to do all of this without the help of the establishment, it puts us in such an amazing position,” Platner said on MSNBC’s “Morning Joe.”
Maine is far from an isolated case. Prominent anti-establishment clashes are roiling Senate primaries in Michigan, Minnesota, and Iowa, with Sanders planning to campaign in Detroit this weekend for Michigan candidate Abdul El-Sayed, who is running in a three-way primary. Sanders’s political adviser, Faiz Shakir, said the mood extends beyond Democratic primary voters. “There’s a desire to turn the page on the old guard. It’s not even just the Democratic electorate. There’s a populist mood in this country,” Shakir said.
In Michigan, state Sen. Mallory McMorrow released a video Thursday explicitly stating she would not support Schumer as Senate Democratic leader if elected, calling the current Republican Party a “MAGA party” that required a fundamentally different response. Veteran Democratic strategist Lis Smith linked the anti-establishment upsurge to the party’s 2024 losses, saying that voters are “sick of the gerontocracy, sick of the status quo, and Chuck Schumer has completely misread that.”
Schumer’s allies, speaking privately, downplayed the backlash, noting that the leader’s preferred candidates in North Carolina, Ohio, and Alaska have not faced the same headwinds as Mills did in Maine. The four states represent the party’s most plausible path to a majority in the chamber, which currently has 53 Republicans, 45 Democrats, and two independents who caucus with Democrats. Schumer spokesperson Allison Biasotti said the leader’s “North Star is taking back the Senate” and defended the recruitment effort.
Moderate Democrats, however, are raising alarms. Matt Bennett, co-founder of the center-left group Third Way, said Platner’s emergence would “without a doubt” make it harder to defeat Collins and warned that similar primary dynamics could play out elsewhere. “If you would like to beat Donald Trump’s Republicans, you better nominate people who can win,” Bennett said.
Mills, at 78, would have been the oldest freshman senator in history had she won; she had pledged to serve only one term. Platner’s youth and outsider profile, by contrast, have energized a Democratic base that polls show is increasingly confident about a midterm wave but deeply skeptical of the party’s long-serving leaders. The Maine result, coming just months before the general election, sharpens the choice facing Democratic primary voters across the country: stand with the party establishment that has built the campaign infrastructure or gamble on newcomers who promise a more aggressive fight.