Troy Jackson Defeats Susan Collins in Maine, Delivering a Major Senate Flip for Democrats

A longtime Republican incumbent loses after nearly three decades in the Senate

Democrat Troy Jackson defeated Republican Sen. Susan Collins in Maine's 2026 U.S. Senate election, ending one of the longest-running Republican Senate careers in the region. Collins called Jackson to concede and said she would help ensure a smooth transition. The Associated Press later called the race for Jackson. The result gave Democrats another important pickup in their effort to take control of the Senate and removed a veteran Republican who had repeatedly survived difficult reelection campaigns in a state that has leaned Democratic in presidential elections. Jackson is a former president of the Maine Senate and a fifth-generation logger from the rural northern town of Allagash. He had originally run for governor and finished third in the Democratic primary. After the party's original Senate nominee, Graham Platner, withdrew, Democrats selected Jackson as his replacement in late July. The Associated Press and Maine Public reported that Jackson had little more than 100 days to build a campaign against an incumbent with decades of experience, a strong fundraising network and a prominent role in Washington.

Cost pressures and Trump's policies became central campaign issues

Jackson presented himself as a representative of working-class voters. His campaign emphasized housing, health care, workers' rights and the cost of living. He argued that Collins had not done enough to challenge President Donald Trump's agenda. Reuters reported that the war with Iran pushed up fuel and home-heating oil costs, an especially significant issue in a rural state with long winters. Trump's trade conflict with Canada also weighed on industries important to Maine, including tourism, lobster fishing and logging. Collins ran on her seniority, her record of bipartisan work and her influence as chair of the powerful Senate Appropriations Committee. She had sought to maintain some distance from Trump and highlighted occasions when she had broken with her party. But Democrats repeatedly tied her to the administration's broader policies and questioned whether she had used her independence to provide meaningful checks on the president. Reporting by The Boston Globe and Maine Public described the difficulty Collins faced in preserving the coalition that had supported her in previous elections. Her moderate image and ability to deliver federal resources had helped her win in a Democratic-leaning state. This year, however, the national political climate, rising costs and voter frustration made that formula less effective.

A late change in the Democratic nominee and a costly campaign could not save the seat

The race was unusual because Democrats changed candidates late in the cycle and still mounted a serious challenge. Jackson received support from progressive figures, including Sen. Bernie Sanders. Axios reported that Jackson's campaign portrayed Collins as an enabler of Trump's agenda. Republican groups, meanwhile, attacked Jackson's record in state politics and raised personal controversies in an effort to undermine his appeal. Maine Public reported that the two sides and their affiliated political organizations spent at least $224 million, making the contest one of the most expensive Senate races on a per-capita basis. Collins and her allies had substantial financial resources, but that advantage was not enough to overcome the political headwinds facing Republicans. Jackson's victory gives Democrats another member of their incoming Senate majority and changes Maine's representation in Washington. He has supported progressive policies such as universal health care and has described himself as a voice for working families. His next challenge will be to translate those campaign commitments into legislation while representing a state with voters across the political spectrum. For Republicans, Collins's defeat demonstrates the limits of incumbency and a moderate brand when national political conditions become dominant. For Democrats, the win is both a symbolic rejection of a longtime Republican figure and a practical gain in a Senate where every seat will matter as the party takes responsibility for governing.