Maine · Senate
Score updated May 30, 2026
Read more on BallotpediaNo polling data
| Pollster | Grade | Date | UNAF% | UNEN% | Margin |
|---|---|---|---|---|---|
| Echelon Insights (Collins vs. Platner) | B | 2026-04-09 | — | — | — |
| Echelon Insights (Collins vs. Mills) | B | 2026-04-09 |
Republican Primary · Jun 9
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| Maine People's Resource Center (Collins vs. Mills) | B | 2026-03-31 | — | — | — |
| Maine People's Resource Center (Collins vs. Platner) | B | 2026-03-31 | — | — | — |
| Emerson (Collins vs. Platner) | B | 2026-03-23 | — | — | — |
| Emerson College (Collins vs. Mills) | B | 2026-03-23 | — | — | — |
| OnMessage (Collins vs. Platner) | B | 2026-03-08 | — | — | — |
| OnMessage (Collins vs. Mills) | B | 2026-03-08 | — | — | — |
| University of New Hampshire (includes Susan Collins and Graham Platner) | B | 2026-02-16 | — | — | — |
| University of New Hampshire (includes Susan Collins and Janet Mills) | B | 2026-02-16 | — | — | — |