**Proposal 1, the automatic 16-year question on calling a constitutional convention, appears on Michigan’s November 3, 2026 ballot.** A broad, cross-partisan coalition including business chambers, labor unions, the ACLU, the Michigan Catholic Conference, and both abortion-rights and anti-abortion groups has organized under “Protect MI Constitution From Special Interests” to oppose it, citing risks to existing provisions on reproductive rights, environmental protections, taxes, and term limits. Gov. Gretchen Whitmer has publicly urged rejection on similar grounds. Historical precedent shows voters rejected the measure by wide margins in 1978, 1994, and 2010. Recent polling indicates plurality support for yes but with substantial undecided voters, while organized opposition and the uncertain, open-ended process of electing 148 delegates for a 2027 convention have reinforced trader expectations of rejection.