Mills is pro filibuster, she is anti-decriminalisation for small personal use amounts of drugs, she has been anti red-flag laws for guns, she has vetoed collective bargaining rights (so is anti-union to an impactful degree), she has vetoed wealth taxes, she has vetoed protections for renters, and she has vetoed some tribal sovereignty laws, etc.
One of her latest unpopular moves: On April 24, 2026, Mills vetoed a bipartisan bill that would have made Maine the first state in the nation to enact a statewide temporary ban on large data center developments.
All of that is not even taking into account she would be 85yo at the the end of her first term if she were to win both the primary and the general election. She would be the oldest ever newly elected first term US Senator in American history.
Strimling: Why Gov. Mills is losing support among Democrats
https://mainebeacon.com/strimling-why-gov-mills-is-losing-support-among-democrats/
Gov. Janet Mills has a popularity problem. And not just with some Republicans who have, shall we say, disliked her for years.
No, this problem is with her base. Heres the story: In June, Gov. Janet Mills was soaring with 55% job approval (+11) including 90% among Democrats. Undoubtedly those numbers were buoyed by her standing up to Trump last winter when he tried to defund us for treating trans kids with dignity. But, in truth, her numbers have been in this range for basically her entire second term.
Not anymore. Today, her numbers have plummeted, almost exclusively because of how Democrats feel about her job performance.
In a late October
survey by the same firm that conducted the June survey, Mills job approval dropped 12 points from June to 43% (a 23 point net negative swing). Among Democrats, her support
cratered from 90% to 68%. All in less than four months.
snip
All of the above actions/outcomes, plus also the age issue and her ineffective campaigning style/strategies combined to make her a poor candidate to take out Platner, and of course Collins as well.