General election
- Bobby Charles Republican
lawyer and former U.S. Assistant Secretary of State (2003–2005)
- Hannah Pingree Democrat
former director of the Maine Governor's Office of Policy Innovation, former Speaker of the Maine House of Representatives (2008–2010) from the 36th district (2002–2010), and daughter of U.S. Representative Chellie Pingree
- Robert Charles Republican
Primaries
Democratic primary
former director of the Maine Governor's Office of Policy Innovation, former Speaker of the Maine House of Representatives (2008–2010) from the 36th district (2002–2010), and daughter of U.S. Representative Chellie Pingree
energy executive and son of U.S. Senator and former governor Angus King
former principal deputy director of the Centers for Disease Control and Prevention (2023–2025) and former director of the Maine CDC (2019–2023)
Maine Secretary of State (2021–present) and nominee for U.S. Senate in 2014
former President of the Maine Senate (2018–2024) and candidate for Maine's 2nd congressional district in 2014
Republican convention straw poll
former CEO of Crunch Fitness
healthcare executive and nephew of former president George H. W. Bush
former majority leader of the Maine Senate and candidate for governor in 2018
Owen McCarthy 8.8%- Robert Wessels 6.3%
- David Jones 5.3%
Bobby Charles