Customers eat breakfast at Rock's Diner in the border town of Fort Kent, Maine on October 14, 2026. Susan Collins has held her Senate seat for three decades, becoming a near immovable fixture in the state's political landscape. But with Trump deeply unpopular nationwide and Mainers furious about surging fuel prices ahead of winter, Collins's Democratic challenger is eying an upset -- and a chance to make his party's outside bid to regain the Senate a reality. (Photo by CHARLY TRIBALLEAU / AFP via Getty Images)