As Maine approaches its Democratic primary on June 9, the political landscape is becoming increasingly turbulent, particularly for Senator Susan Collins, who must navigate a challenging re-election campaign ahead of the November midterms. The 2026 elections have already become focal points of heated debate within Maine, with early polling indicating potential vulnerabilities for Collins, a moderate Republican.
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Collins announced her bid for a sixth Senate term on February 10, 2023, despite her earlier commitments during the 1996 campaign to serve only two terms. This decision comes at a time when Maine, which has trended Democratic in every presidential election since 1992, continues to showcase a distinct political shift: in the 2024 presidential race, the state backed Kamala Harris by a notable 7-point margin.
As Maine’s last remaining Republican in Congress, Collins finds herself in a precarious position, particularly given the Democratic primary that will determine her opponent for the general election. Two frontrunners are emerging in the Democratic field: Janet Mills, the state’s current governor who enjoys the support of the party establishment, and Graham Platner, a political newcomer and former military veteran who has quickly gained popularity as an anti-establishment candidate.
Polling data suggests that the outcome of the Democratic primary could significantly influence Collins’s chances of re-election. According to a Quantus Insights poll released on March 9, Collins and Mills would find themselves nearly neck-and-neck in a general election scenario, with Collins leading Mills by a slim margin of 44.6% to 43%. Conversely, if Collins were to face Platner in November, the surveys indicate she would trail, with Platner receiving 48.6% compared to Collins’s 41.8%.
A subsequent poll from OnMessage Public Strategies offered a more nuanced perspective, showing Collins and Mills in a statistical tie at 42% each. However, in a direct matchup against Platner, Collins would again find herself on the back foot, garnering only 42% compared to Platner’s 44%. Analysts attribute these fluctuating numbers to the familiarity voters have with both Collins and Mills, both seasoned politicians with established ties to the state.
Platner, who is 41, has positioned himself as a refreshing alternative, particularly when considering the ages of his opponents; Collins would be 80 by the end of her next term, and Mills would be 85. This generational contrast could play a significant role in how voters perceive their choices as the campaign unfolds.
The primary race between Mills and Platner has intensified, particularly since Platner’s candidacy received early support but was soon scrutinised upon Mills entering the race. Reports surfaced alleging that Platner had previously expressed extreme views online, with some of his comments deemed offensive. While he has admitted to making regrettable posts during a moment of frustration, he has since distanced himself from that persona, striving to focus instead on his current campaign.
Moreover, Platner has faced backlash for a past tattoo that resembled a Nazi symbol, which he has since had removed. Despite these controversies, he remains a preferred candidate among certain voter segments who are keen to see a departure from the political establishment.
Recent polling by Pan Atlantic Research has shown Platner leading Mills 46% to 39%, with another survey indicating a more competitive dynamic. Nevertheless, there remains a potential for shifts in public opinion as the primary season progresses, particularly with several months left to campaign.
The rising tensions between candidates were further exemplified during an interview where Platner accused the Democratic Senatorial Campaign Committee of attempting to undermine his candidacy, alleging that negative press about his past was orchestrated by Mills’ campaign. Mills’ spokesperson, however, dismissed these claims, highlighting the need for Platner to take responsibility for his comments instead of casting blame.
Amid the evolving narratives, endorsements remain a critical factor. Platner secured backing from progressive figures like Vermont Senator Bernie Sanders, while Mills has garnered support from prominent Democrats, including Senate Majority Leader Chuck Schumer.
As the campaigns advance, both Collins and the Democratic candidates will undoubtedly focus on their strategies to appeal to Maine voters who are increasingly scrutinising candidate backgrounds and policy stances. With the stakes high in this critical Senate race, Maine’s political scene is set for an unprecedented showdown this November.
