The measure, certified as Question 3 for the November 3, 2026 ballot after the Supreme Judicial Court rejected a June 2026 legal challenge from Democratic committee members, would replace separate party primaries with a single all-party top-two system advancing the highest vote-getters to the general election starting in 2028. Proponents, including independents and some moderate Democrats, highlight the state's large unenrolled voter share and low primary competitiveness as reasons for broader participation, while both major party organizations and many legislators oppose it over concerns about reduced party control and potential same-party general election matchups. Recent October coverage of campaign clashes and voter guides underscores divided elite views but sustained grassroots momentum, producing the current 59.5% implied probability for approval.