Progressive Challenger Takes Over—Governor’s Exit Changes Everything

Exterior view of a historic government building with a dome and columns

Maine Governor Janet Mills has abruptly withdrawn from the Democratic Senate primary just weeks before the June 9 vote, handing the nomination to controversial progressive challenger Graham Platner and raising serious questions about the Democratic establishment’s ability to field electable candidates against Republican incumbent Susan Collins.

Story Snapshot

Governor Mills exits Senate race weeks before Democratic primary, citing fundraising struggles
Progressive challenger Graham Platner now positioned as Democratic nominee against Susan Collins
Mills’ withdrawal signals deep divisions within Maine’s Democratic Party and fundraising weakness
Republican Senator Susan Collins likely strengthened heading into general election against Platner

Mills Cites Fundraising Difficulties in Surprise Exit

Governor Janet Mills suspended her campaign for the U.S. Senate ahead of Maine’s June 9 Democratic primary, signaling she struggled to raise enough money to mount a competitive challenge. Mills entered the race in October 2025 after progressive candidate Dan Kleban dropped out, positioning herself as the establishment choice to take on Republican Senator Susan Collins. Her withdrawal just weeks before the primary represents a stunning reversal for a sitting governor and leaves Graham Platner as the likely Democratic nominee in a race national Democrats had hoped to compete for seriously.

Controversial Progressive Platner Gains Clear Path

Graham Platner, who has run a contentious campaign against Mills, now stands as the presumptive Democratic nominee following the governor’s exit. The primary race between Mills and Platner had grown increasingly bitter in recent weeks, with Platner’s campaign releasing a memo in early April claiming Mills was “all but over” in the contest. Mills’ campaign spokesperson Tommy Garcia had defended her candidacy at the time, but the fundraising realities apparently proved insurmountable. Platner’s progressive platform and confrontational campaign style raise concerns among moderate Democrats about electability against the popular incumbent Collins in November’s general election.

Democratic Establishment Faces Another Setback

Mills’ withdrawal highlights a troubling pattern for establishment Democrats struggling to maintain control over their party’s direction and candidate selection. The governor’s inability to raise sufficient funds despite holding Maine’s highest office suggests either donor fatigue with traditional Democratic candidates or lack of confidence in the party’s Senate prospects. This development mirrors broader frustrations among voters who see party elites failing to deliver results or field candidates who can genuinely compete. Mills’ exit also represents a significant loss of institutional knowledge and statewide electoral experience that could have made the race against Collins more competitive than Platner’s outsider campaign likely will.

Collins Positioned for Strong Reelection Campaign

Republican Senator Susan Collins enters the general election campaign in a significantly strengthened position following Mills’ departure from the Democratic primary. Collins, a moderate Republican who has won multiple statewide elections in Maine, will likely benefit from facing Platner rather than the more established Mills. The Democratic primary turmoil and fundraising struggles demonstrated by Mills suggest Republicans may have an easier path to holding this seat than initially anticipated. Collins’ experience and moderate positioning have historically appealed to Maine’s independent voters, who will prove crucial in November. The senator’s campaign can now prepare for a general election against a less-tested Democratic opponent while Democrats regroup from yet another establishment setback in candidate recruitment and retention.