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2026 Maine Senate race election results: Susan Collins vs. Troy Jackson
Ranked-choice voting could delay results as Democrats try to flip a seat that may decide Senate control.
On Tuesday, voters cast ballots in Maine's high-stakes Senate race between 30-year incumbent Republican Senator Susan Collins and Democratic challenger Troy Jackson, a contest that could determine control of the U.S. Senate.
The race intensified after Democratic nominee Graham Platner withdrew in July, prompting Democrats to select Jackson, a progressive state legislator, as their replacement candidate in a campaign defined by unprecedented national spending.
More than $284 million in advertising flooded the state, with Republican-aligned groups outspending Democrats by over $46 million, as both campaigns traded bitter attacks over Collins's voting record and Jackson's family ties.
Maine Secretary of State Shenna Bellows warned that ranked-choice voting procedures could delay final results past midnight, as election clerks across hundreds of municipalities began counting ballots Tuesday night.
Senate control remains in the balance as voters assessed Collins's long tenure on the Senate Appropriations Committee against widespread criticism over her 2022 vote to confirm Brett Kavanaugh to the U.S. Supreme Court.