Maine Gov. Janet Mills will challenge Sen. Susan Collins in 2026, setting up one of the year’s most competitive races with control of the Senate in play.
Breakdown
- Governor Janet Mills has entered the 2026 Senate race in Maine.
- Mills will challenge incumbent Republican Senator Susan Collins. 7s
- The race is expected to be highly competitive as Republicans aim to keep their Senate majority. 13s
- There are 33 Senate seats up for election, with 20 currently held by Republicans. 21s
- Maine is the only GOP-held Senate seat in a state not won by Trump in 2024. 26s