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Graham Platner Handed Centrist Dems a Bruising Defeat in Maine

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01.05.2026

Special Investigations

Press Freedom Defense Fund

Graham Platner Handed Centrist Dems a Bruising Defeat in Maine

After throwing their support behind Gov. Janet Mills, party leaders are left doing an about-face on the insurgent candidate.

Eoin Higgins is the author of “Owned: How Tech Billionaires on the Right Bought the Loudest Voice on the Left.”

The Democratic Party’s centrist wing is doing a 180 on Maine senatorial hopeful Graham Platner after Gov. Janet Mills dropped out of the race — a major setback for their side in an ongoing intraparty war for the future of the party. 

The June primary was shaping up to be another proxy fight for the ongoing power struggle between the party’s progressive and centrist wings. Sen. Bernie Sanders, along with Elizabeth Warren, Ruben Gallego, and Martin Heinrich, backed Platner early on; Senate Minority Leader Chuck Schumer and the Democratic Senatorial Campaign Committee, as well as EMILY’s List, threw their support behind Mills. 

But the Democratic voters of Maine didn’t appear interested in a protracted back and forth, nor were they impressed by the party establishment’s perceived shoehorning-in of Mills as an alternative to an upstart, energetic, young candidate they already liked. Some more mainstream Democrats already get that, like Minnesota Gov. Tim Walz, who previously lent his powerful email list to Mills during her campaign announcement; he will host a general election kickoff event with Platner on Friday. Schumer and DSCC Chair Kirsten Gillibrand, meanwhile, announced they “will work with the presumptive Democratic nominee, Graham Platner” to defeat Collins.

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Others should get on board with the new reality. The primary map is only getting more challenging for centrist Democrats. In Michigan, their preferred candidate Rep. Haley Stevens is in a tight race with state Sen. Mallory McMorrow and public health official Abdul El-Sayed. Iowa state Rep. Josh Turek, Schumer’s pick, is neck and neck with state Sen. Zach Wahls; in Minnesota, Schumer’s favored candidate, Rep. Angie Craig, has a significant cash advantage, but Lt. Gov. Peggy Flanagan regularly trounces her in early polling.

The writing was on the wall for Mills weeks ago. She was never able to catch up to Platner’s polling, and her campaign stopped ad spending after attacks on Platner over his past controversies failed to gain traction. It was clear the governor was throwing in the towel last week when she vetoed a data center moratorium bill backed by the Maine Democratic base but opposed by business interests in the state. That choice raised eyebrows; the governor’s suggestion in mid-April that she would have voted against a Senate bill restricting U.S. aid for 1,000 pound bombs........

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