Skip to Main ContentGOP Sen. Susan Collins Announces Reelection BidSen. Susan Collins (R-Maine) formally launched her campaign for a sixth term in Congress on Tuesday.The lawmaker, whose tenure began in 1997, made the announcement while unboxing a pair of New Balance running shoes."This is perfect for 2026 because I'm running," Collins said in a video.Collins is the most vulnerable Republican running for Senate this year. She'll face either Maine Gov. Janet Mills (D) or oysterman Graham Platner, who are vying in the June 9 Democratic Senate primary. See All UpdatesClose