**Mid-decade congressional redistricting has produced new maps for the 2026 midterms in nine states—Alabama, California, Florida, Louisiana, North Carolina, Ohio, Tennessee, Texas, and Utah—while Missouri remains on its prior lines after the U.S. Supreme Court blocked its revised map in late September.** The wave began in summer 2025 when Republican-led legislatures, starting with Texas at President Trump’s urging, passed new districts to gain seats. A late-April 2026 Supreme Court ruling in *Louisiana v. Callais* narrowed Voting Rights Act constraints on majority-minority districts, enabling further changes in Southern states. Democrats countered with California’s voter-approved Prop 50. Most maps survived litigation or procedural challenges and are now in use, with primaries adjusted accordingly; only Ohio’s commission map faces no active legal threat. Trader pricing tracks these confirmed enactments, court stays, and the absence of successful last-minute alterations.