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
- Margin of error
- ±5.1 est. (Not published: estimated from sample size (95%, simple random sample))
- Methodology
- Not published
Results
Pan Atlantic Research, 4 Mar 2026: Platner (D) leads with 46.0%, 7.0 points ahead of Mills (D).
- 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.
How to read a poll
- Sample size is how many people were asked. More people means less random error, never none.
- ±3 is the margin of error: the real figure is likely within 3 points either way of the one shown.
- Two polls can differ because they were taken on different dates, with different methods and different samples.
- est. means the institute did not publish a margin of error, so it is estimated from the sample size.
- The average smooths this out: it combines recent polls, so one unusual poll cannot swing the picture.