Ten states—Alabama, California, Florida, Louisiana, Missouri, North Carolina, Ohio, Tennessee, Texas, and Utah—enacted new congressional maps for the 2026 midterms following a rare mid-decade redistricting wave that began after President Trump urged Texas Republicans in summer 2025. Most changes occurred via legislative action or voter referendum, with some driven by litigation after the Supreme Court’s April 2026 Louisiana v. Callais ruling weakened Voting Rights Act constraints on majority-minority districts. Recent developments include the Court’s June 2026 decision allowing Alabama’s preferred maps and its September 2026 order blocking Missouri’s new map for November, reverting the state to prior lines despite primary use of the updated version. Ongoing challenges in Florida and elsewhere, plus state-specific rules like Ohio’s constitutional requirement, continue to shape which maps reach Election Day and thus trader assessments of final outcomes.