Maine 2026 SENATE FORECAST

2026 Maine Senate Forecast:

The Pollsmax 2026 Maine Senate forecast currently gives Democrat Troy Jackson a 50.8% chance of defeating Republican Susan Collins. Pollsmax projects Jackson to receive 50.1% of the vote compared with 50% for Collins, a projected Democratic margin of 0.1 percentage points. The model currently rates the race as Tilt Democratic. The forecast is updated using 100,000 simulations incorporating polling and race fundamentals. See the Pollsmax forecast methodology.

The 2026 Maine Senate election features Democrat Troy Jackson and Republican Susan Collins. Incumbent senator Susan Collins is seeking reelection to a sixth term, having served in the US Senate since 1997. In 2024, Kamala Harris won Maine by 6.8%, but the election for the state's Senate seat is a toss-up in 2026. The race will test whether the incumbent party can hold its existing Senate coalition as national conditions shift during the midterm cycle. Maine's seat will be critical in determining the balance of power in the US Senate for the second half of President Trump's term, as victory for Democrats will be key in their effort to flip the upper chamber of Congress blue.