Incumbent Sen. Susan Collins (R) and Troy Jackson (D) are running in the general election for the U.S. Senate in Maine on Nov. 3, 2026.
On July 10, 2026, Graham Platner (D), the winner of the 2026 Democratic primary for the U.S. Senate in Maine, withdrew from the general election following an allegation of sexual assault. As a result, the Maine Democratic Party held a nominating convention to select a new nominee. On July 25, 2026, Jackson won the nominating convention, marking the 28th time since 1918 that a new candidate was selected to replace a U.S. Senate nominee.
According to The New York Times' Reid J. Epstein and Jess Bidgood, "By replacing Mr. Platner with Mr. Jackson, Maine Democrats hope to make the race less about their candidate and more about painting Ms. Collins as a tool of the ultrawealthy and a rubber stamp for President Trump on the most pressing matters."
