Ten states—Alabama, California, Florida, Louisiana, Missouri, North Carolina, Ohio, Tennessee, Texas, and Utah—have enacted or court-approved new congressional maps for the 2026 midterms through mid-decade redistricting, a process largely absent since the 1800s. The wave began with Texas Republicans’ 2025 redraw aimed at adding seats, prompting Democratic responses via ballot measures in California and legislative action elsewhere. A U.S. Supreme Court ruling in Louisiana v. Callais altered Voting Rights Act standards on racial considerations in districting, enabling further adjustments in Southern states and lifting some prior injunctions. Ongoing litigation in multiple states creates uncertainty over final implementation, while primaries approach and no further decennial census requires changes until after 2030. Trader focus centers on which maps survive court review before November 2026.