Senator Susan Collins, the last Republican remaining in New England’s congressional delegation, is running for re-election, testing whether a G.O.P. moderate can still hold ground in blue territory. Gov. Janet Mills and the progressive newcomer Graham Platner are challenging Collins, a five-term incumbent. As the only Republican senator representing a state that voted against President Trump in all three of his races — Kamala Harris carried Maine by just under seven percentage points — Collins is reliant on cross-party voters, a group that has largely disappeared from national politics.
Who Is Ahead in the U.S. Senate Race in Maine? Latest 2026 Polls
