Maine Senate Democrats nominated Troy Jackson to challenge Republican incumbent Susan Collins in the November 2026 general election, selecting the former state Senate president at a nominating convention on July 25 after the party’s original candidate withdrew amid allegations.
Jackson, a fifth-generation logger from Allagash in northern Maine, secured 566 delegate votes across all 16 counties to clinch the Democratic nomination. He replaces Graham Platner, who formally withdrew from the race on July 10 following a sexual assault allegation that he denied.
The nomination came with immediate high-profile support. Vice President Kamala Harris endorsed Jackson on July 28, citing his background as a labor organizer and progressive on economic issues. Jackson launched his first general election advertisement shortly after, highlighting his work as a labor leader and his two decades in the Maine legislature, where he served six years as Senate president.
Jackson’s path to the nomination was rapid. When Platner withdrew, state law required Democrats to hold a special nominating convention by July 27 to place a replacement on the ballot. Jackson emerged as the consensus candidate among the party’s delegates, who selected him over other contenders including public health official Nirav Shah and state Senator Shenna Bellows.
The race against Collins is among the most competitive in the 2026 Senate cycle. Recent polling shows Jackson leading Collins 49 percent to 46 percent, a significant shift from earlier surveys when Platner held a narrower 49-47 lead over the three-term senator. Collins, who ran unopposed in the Republican primary in June, has represented Maine in the Senate since 1997.
Jackson’s candidacy centers on economic issues and labor rights. The Democratic Party has focused the race on Collins’s record on reproductive rights, particularly her votes on federal abortion legislation. Jackson has emphasized his work with Governor Janet Mills to advance abortion rights protections in Maine state law.
With approximately 100 days until the November election, both campaigns are entering the intensive final phase. Jackson’s nomination resolved the uncertainty that followed Platner’s departure and gave Democrats a candidate with deep roots in Maine politics and a progressive voting record in the state legislature.
Sources
- Maine Democratic Party — official announcement of Troy Jackson as Democratic nominee with delegate vote count
- NBC News — Graham Platner’s official withdrawal from the race on July 10, 2026
- Maine Public — Troy Jackson’s nomination at the Democratic convention on July 25
- Spectrum Local News — Kamala Harris endorsement of Troy Jackson on July 29
- The New York Times — polling data showing Jackson leading Collins 49 percent to 46 percent
- USA Today — background on Jackson’s political experience and progressive credentials
- The Guardian — overview of the Maine Senate race dynamics following Jackson’s nomination
