Michigan voters will decide on November 3, 2026, whether to convene a constitutional convention under the automatic 16-year referendum required by the 1963 Constitution. Historical patterns show consistent rejection of such measures, including 67 percent opposed in 2010, 72 percent in 1994, and 77 percent in 1978. Organized opposition through coalitions such as Protect MI Constitution from Special Interests, including labor groups, has mobilized against broad revision, citing risks of unpredictable outcomes and preference for targeted amendments via petition. Limited organized support for calling a convention has emerged despite some legislative backing. This sustained voter skepticism and absence of momentum for approval underpin the strong trader consensus against passage. Late developments such as a major polling shift, high-profile endorsements, or unexpected campaign spending could still alter trajectories before election day.