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United States / 2026 Maine Senate Democratic primary

Pan Atlantic Research

Voting intention · published 4 Mar 2026

Country: 🇺🇸 United States
Election: 2026 Maine Senate Democratic primary
Polling institute: Pan Atlantic Research
Published: 4 Mar 2026
Fieldwork: 13 Feb 2026 – 2 Mar 2026
Sample size: 367
Methodology: Not published

Results

Graham Platner (D)46.0%+9.0 percentage points
Janet Mills (D)39.0%−8.0 percentage points
David Costello (D)4.0%+3.0 percentage points

Change in percentage points vs. the previous poll by the same institute for this election.

Note: Collected from Wikipedia (2026 United States Senate election in Maine, Democratic primary › Polling).

Source

Pan Atlantic Research

View original source (opens in a new tab)

https://drive.google.com/viewerng/viewer?url=https://21701012.fs1.hubspotusercontent-na1.net/hubfs/21701012/20260304%252068th%2520Omnibus%2520Poll%2520March%25202026.pdf&wmode=opaque

This poll was conducted by Pan Atlantic Research. Pollytic republishes the headline figures with attribution.

Polls are estimates of public opinion and are not election results. How we handle polls