Who is forecasted today to win the Maine Senate race?
Updated Tuesday, October 27, 2026 · 7 days to Election Day · VotePredictor
Susan Collins is favored. The VotePredictor forecast gives Collins a 60% chance of beating Troy Jackson, with a predicted margin of Collins +0.9. That is still close to a toss-up: Collins wins about three times in five, and Jackson in the other 40%.
What the forecast is built on
The forecast starts from the 11 public polls in the forecast window, whose plain average is Jackson +1.8. Each poll is corrected for its voter screen and its pollster's measured house effect first (the “Adjusted” column below).
- The polls, weighted and corrected, read Collins +0.8.
- The fundamentals (the state's presidential lean, incumbency, the last result and the national environment) read Collins +1.3.
- The published forecast blends the two, mostly on the polls, at Collins +0.9.
Misses of a few points are common, so a 0.9-point lead is a 60% chance and not a lock.
How the forecast has moved
| Date | Collins's chance | Predicted margin |
|---|---|---|
| Jul 23 | 51% | Collins +0.3 |
| Aug 6 | 46% | Jackson +1.6 |
| Sep 1 | 48% | Jackson +0.6 |
| Oct 1 | 63% | Collins +1.3 |
| Oct 20 | 40% | Jackson +0.9 |
| Oct 27 (today) | 60% | Collins +0.9 |
The polls
11 polls are in today's forecast; 3 older ones have aged out and are shown dimmed. Margins are Democrat minus Republican.
The polls behind it
14 polls · 11 in today's forecast · newest firstDimmed polls are more than 61 days old. They stay on the record, but today's forecast no longer counts them. Each pollster name links to the poll's source.The VotePredictor margin is the poll after correcting for its pollster's record in past elections and for registered-voter or all-adult samples.
What everyone else says
Prediction markets
| Market | Collins's chance |
|---|---|
| Polymarket | 39% |
| VotePredictor | 60% |
Rating shops
| Forecaster | Rating | As of |
|---|---|---|
| The Economist | Lean D | Oct 26, 2026 |
| FiftyPlusOne | Lean D | Oct 26, 2026 |
| NBC News | Lean D | Oct 26, 2026 |
| Silver Bulletin | Lean D | Oct 25, 2026 |
| Split Ticket | Lean D | Oct 27, 2026 |
| Cook Political Report | Toss-up | Oct 20, 2026 |
| Decision Desk HQ | Toss-up | Oct 26, 2026 |
| Fox News | Toss-up | Oct 20, 2026 |
| Inside Elections | Toss-up | Oct 15, 2026 |
| RealClearPolitics | Toss-up | Oct 26, 2026 |
| Sabato's Crystal Ball | Toss-up | Oct 14, 2026 |
0 of 11 rating shops favor Collins, 6 call it a toss-up and 5 favor Jackson. The markets average 39% for Collins; VotePredictor is 22 points more confident in Collins.
Can you trust this forecast?
Every VotePredictor forecast is scored after the election against the same outcomes as everyone else's. Across 615 past races (Senate, governor, House and president), our final forecasts rank #2 of every forecaster that covered them all (Brier score 0.075, lower is better); FiveThirtyEight is first at 0.074. The full record is on the forecaster rankings and methodology pages.
This article is regenerated every day from the VotePredictor forecast, the poll database, the prediction markets and the rating shops' latest published ratings. Live numbers are on the race page.