AdImpact, an organization tracking political ads, estimates the Maine Senate contest could help draw more than $300 million in spending on congressional races in the state next year. That’s nearly a third more than the record-smashing amount spent in 2020 when Republican U.S. Sen. Susan Collins secured her fifth term.
Dec. 12, 2025: Deep-pocketed groups are already spending on the Maine U.S. Senate race. Here’s an early guide
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