Voters will decide Question 3 on November 3, 2026, which would replace Massachusetts party primaries with a single all-party primary where the top two vote-getters advance to the general election, starting in 2028 for state and congressional races. The measure cleared legal hurdles in June after Democratic state committee challenges, yet both major party organizations now oppose it, citing risks to party roles in candidate selection and potential general-election matchups between same-party candidates in the heavily Democratic state. Supporters, including some moderate Democrats and former officials, argue it would boost competition, independent voter participation, and broader appeal in a state where unenrolled voters form a large share of the electorate. Campaigns are actively clashing over impacts on turnout and donor influence, leaving the outcome tightly balanced ahead of early voting.