An Act to implement all-party state primaries

H 5003, "An Act to implement all-party state primaries," changes Massachusetts' primary election system to allow voters to choose any candidate regardless of party affiliation. The bill establishes a "top two" primary system where the two candidates receiving the most votes for each office - across all parties - advance to the general election. It removes restrictions requiring voters to register with a party to vote in primaries and updates ballot formatting to omit party labels for candidates. The law affects all state primary voters and candidates, taking effect January 1, 2028.