Troy Jackson Locks Up Maine Democrats' Senate Nomination to Challenge Susan Collins After Rivals Fold

Troy Jackson, a plain-spoken logger from Maine's far-north Aroostook County and a former president of the state Senate, has effectively secured the Democratic nomination for U.S. Senate, positioning him to challenge Republican Sen. Susan Collins in one of the most closely watched races of the 2026 midterms.

Jackson dominated a weekend of county caucuses held to replace Graham Platner, the Democrat who won the party's primary but abruptly withdrew this month amid a sexual-assault allegation. According to tallies reported by his campaign and state party officials, Jackson captured 456 of the 500 elected delegate slots contested across Maine's 16 counties, an overwhelming margin that all but ended the contest.

The math leaves little doubt. A total of 601 delegates, including 101 sitting state committee members, are scheduled to convene on July 25 to formally choose the nominee, and 302 votes are needed to win. With his 456 elected delegates already in hand, Jackson is comfortably over the threshold. By Sunday night, his remaining major rivals, Secretary of State Shenna Bellows and physician and former state health official Nirav Shah, had both dropped out and moved to consolidate the party behind him.

Jackson, who served as state Senate president from 2018 to 2024, ran to Platner's left on policy. He backs "Medicare for All," steeper taxes on billionaires and abolishing Immigration and Customs Enforcement, a populist platform he has paired with a blue-collar biography aimed squarely at the working-class voters who have drifted from Democrats in recent cycles.

The general election now shapes up as a marquee battle. Collins, first elected in 1996 and one of the last remaining moderate Republicans in the Senate, is seeking a sixth term in a state that has trended Democratic in presidential years but has repeatedly returned her to Washington. National party committees on both sides view the seat as pivotal to control of the chamber, and tens of millions of dollars in outside spending are expected to pour into Maine before November.

Democrats had spent weeks bracing for chaos after Platner's exit, fearful that a messy replacement fight would hand Collins an opening. Instead, Jackson's rapid consolidation gives the party a unified nominee and a running start, sparing it the prolonged and public infighting that strategists had feared could sink the campaign before it began. "Mainers are ready for a senator who works for them, not the powerful," Jackson told supporters over the weekend as his opponents stepped aside. The formal vote on July 25 is now expected to be a coronation rather than a contest.