Maine Democrats formally selected state Senate President Troy Jackson as their 2026 Senate nominee at a party convention, replacing Graham Platner as the candidate who will face Republican incumbent Susan Collins in November. The move was confirmed Saturday after party delegates convened to choose a new standard-bearer for the race.

Jackson, who leads the Maine state Senate, emerged from the convention process as the chosen nominee. Platner had previously won the Democratic primary but stepped aside, triggering the party process that culminated in Jackson's selection. The circumstances surrounding Platner's departure prompted the party to convene and select a replacement under party rules.

Collins, a four-term Republican senator known for her moderate positioning, has long been considered one of the most competitive incumbents in the country. The Maine Senate race is expected to attract significant national attention and fundraising from both parties as Democrats seek to gain ground in the chamber.

Jackson's selection positions the race as a contest between two prominent Maine political figures. As state Senate President, Jackson has a record and profile familiar to Maine voters, which supporters argue gives him a credible path to challenging Collins. The general election campaign is expected to focus on issues including healthcare, the economy, and federal policy priorities.