Maine’s progressive US Senate hopeful Graham Platner smelled blood in the water after the national fundraising arm for Senate Republicans dumped a record investment into the reelection campaign of Sen. Susan Collins.

Senate Majority Leader John Thune (R-SD) boasted that the $42 million investment, most of which will go to an advertising blitz to help the vulnerable five-term senator cling to her seat in November, was the largest the GOP’s Senate Leadership Fund had ever spent in Maine.

But while the fund’s executive director, Alex Latcham, said it was a testament to Collins’ (R-Maine) “history of winning tough races against Washington Democrats,” Platner—a military veteran and oyster farmer who has never held higher office—portrayed it as a sign of her vulnerability.

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“They’re getting nervous,” he wrote in a post on social media, which urged supporters to donate.

Since announcing his campaign less than five months ago, Platner has been amassing his own sizable war chest of nearly $8 million on the back of small-dollar donations, including $4.7 million in just the final quarter of 2025.

If Democrats have any chance of flipping four seats and retaking the Senate in the midterms later this year, the path will almost certainly include unseating Collins.

Polling out of Maine has varied, but has more often tended to show both Platner and his centrist primary opponent, Democratic Gov. Janet Mills, running within the margin of error against Collins or outright leading her.

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The majority of polls logged by the New York Times show Platner leading Mills in June’s Democratic primary, including one released in mid-December by the progressive-leaning polling firm Workbench Strategies, which showed him ahead by 15 points. But the results vary widely, with some showing Platner up by as many as 34 points over Mills, while others show Mills leading by double digits.

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