Troy Jackson (D) and incumbent Susan Collins (R) remain locked in a toss-up for Maine’s U.S. Senate seat, with recent polling averages showing Jackson ahead by roughly two to three points among likely voters yet many surveys falling within the margin of error. The race’s tightness stems from Collins’s decades-long record of bipartisan positioning and constituent service in a state that leans Democratic but has repeatedly supported her, offset by Jackson’s emphasis on affordability concerns, union priorities, and opposition to Trump administration policies. Heavy outside spending and a saturated ad environment have kept both candidates competitive heading into the November 3 election, while the broader midterm environment and voter assessments of the national political climate continue to shape turnout expectations in this closely watched contest.