Massachusetts voters will decide Question 3 on November 3, 2026, which would replace separate party primaries with a single all-party primary advancing the top two candidates regardless of affiliation. The measure cleared its final legal hurdle in June when the Supreme Judicial Court rejected challenges from Democratic Party leaders. Trader odds remain near even because Democratic officials are divided—some moderates including Representatives Seth Moulton and Jake Auchincloss support the change, while party leadership and most state legislators oppose it, citing reduced party influence and potential advantages for well-funded candidates. Recent voter guides from Tufts and the Secretary of State highlight mixed evidence from California and Washington on polarization and turnout. Upcoming endorsements, campaign spending, and turnout patterns in the final weeks could shift the narrow balance either direction before election day.