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Platner Opens Wide Lead Over Mills in Maine Democratic Senate Primary

Ad spending now sets the terms of a contest both parties rate as a toss-up.

Overview

  • Multiple recent polls from Impact Research and Emerson show Graham Platner with a sizable primary lead over Gov. Janet Mills and performing at least as well as Mills in hypothetical matchups with Sen. Susan Collins.
  • Mills has aired ads spotlighting Platner’s decade-old Reddit posts that demeaned sexual assault victims and a skull tattoo linked to Nazi imagery, while Platner has apologized and says he has removed the tattoo.
  • Platner holds a tactical edge on the air with more than triple Mills’ TV time booked this week, and he previously outraised her by almost $2 million in late 2025 with a donor base dominated by small contributions.
  • Outside spending plans point to a costly fall, with Republican-aligned groups reserving roughly $67 million in Maine ads and Democratic super PAC Senate Majority PAC setting aside $24 million, as EMILY’s List has not yet added new support for Mills.
  • With first-quarter finance reports due soon and the June 9 primary nearing, Democratic leaders are watching for fresh fundraising and polling signals that could influence national investment and determine who challenges Collins.