The race for the Maine Senate seat is competitive, with Republican incumbent Susan Collins leading Democratic challenger Graham Platner by three percentage points, according to a Fox News poll. Among registered voters, Collins garnered 50% support compared to Platner's 47%.

However, the poll reveals a notable difference in voter motivation. Among the two-thirds of voters who identified as extremely motivated to vote, Platner holds a nine-point advantage, leading 53% to 44%. This disparity is attributed to a 15-point enthusiasm gap, with 76% of Democrats reporting high motivation to vote, compared to 61% of Republicans.

Voters in Maine express reservations about both candidates. More than half of those polled indicated that Platner lacks the judgment to serve as a U.S. senator, while a similar proportion believes Collins has held office for too long. Concerns about Platner's judgment are more intense, with nearly 4 in 10 voters extremely worried about it, compared to 3 in 10 concerned about Collins' lengthy tenure. Approximately one-third of independent voters expressed extreme concern about both Platner's judgment and Collins' time in office.

Despite these concerns, some voters remain committed to their chosen candidate. About 1 in 10 voters who are concerned about Platner's judgment still support him, and 2 in 10 voters worried about Collins' tenure continue to back her.

Platner is underperforming compared to past Democratic performance in the state. While Kamala Harris won Maine by nearly 7 points in 2024, Platner trails Collins among key demographic groups that supported Harris, including women, voters with college degrees, suburban voters, and moderates.

Collins' support is strong among men, voters without a college degree, gunowner households, and rural voters, where she is matching her previous re-election performance. She also holds broad support within her party, with 97% of MAGA Republicans and 82% of non-MAGA Republicans favoring her. Platner secures 86% of Democratic support, while independents narrowly favor him by two points.

Inflation emerged as the top issue influencing Maine voters' Senate choice, cited by 30%, followed by political divisions (19%), healthcare (17%), and immigration (14%). Inflation is the primary concern for independents and Democrats, while Republicans narrowly prioritize immigration and border security.

Collins, first elected to the Senate 30 years ago, has a slightly negative favorability rating (47% favorable, 50% unfavorable). Platner's personal rating is weaker, with 43% favorable and 53% unfavorable. President Trump's ratings in Maine are also negative, at 40% favorable and 59% unfavorable.

In the state's gubernatorial race, Democratic candidate Hannah Pingree leads Republican Bobby Charles by 11 points, 53% to 42%. Pingree's lead increases to 18 points among highly motivated voters. The poll was conducted from June 23-27, 2026, with interviews of 1,003 Maine registered voters. The margin of sampling error for the full sample is plus or minus 3 percentage points.