Maine Senate: Platner Leads Primary 68–16.

June 8, 2026 | 3 min read

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Graham Platner leads the Maine Democratic Senate primary at 68%. Janet Mills is at 16%, David Costello at 5%, Andrea LaFlamme at 2%, and 9% are not sure. Margin of error is 5.9%.

Primary Ballot 

Of decided voters, 80% say they're locked in; 20% might change their mind. Forced head-to-head: Platner over Mills 69–31. Platner over "another Democrat": 72–28.

Primary Favorability

What Primary Voters Have Heard About Platner

93% have heard something about Platner in the past week. Of those (n=656): 24% more positive, 34% more negative, 42% neither. Top topics: sexting (36%), dishonesty/character (20%), smear/attack-ad framing (19%), abuse allegations (7%), Nazi-tattoo/extremism claims (2%).

General Election

Mills vs. Collins and Platner vs. Collins are within MOE of each other. Both run 3–4 points behind a generic Democrat.

General-Electorate Favorability

89% of the general electorate has heard something about Platner. Of those (n=1,430): 13% more positive, 57% more negative, 30% neither. Donald Trump's job approval in Maine is 36/62 (−26).

Methodology: Online sample of 704 likely Maine Democratic primary voters fielded via text-to-web on June 5, 2026, weighted by gender, race, age, education, and vote history; margin of error 5.9%. Separate online sample of 1,642 Maine respondents fielded via web panels and text-to-web June 5–8, 2026, weighted by gender, race, 2024 presidential vote, education, age, voter-file registration, and attention checks; margin of error 2.8%. Both surveys commissioned by Tavern Research. AI-assisted drafting, human-verified analysis. Powered by the same tools we build for our clients.

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