Ten states—Alabama, California, Florida, Louisiana, Missouri, North Carolina, Ohio, Tennessee, Texas, and Utah—have enacted new congressional maps since mid-2025 through legislative action, special sessions, or court orders, marking the largest wave of mid-decade redistricting in over a century. Key drivers include the Supreme Court’s May 2026 ruling in Louisiana v. Callais, which altered Voting Rights Act standards and prompted map revisions in multiple Southern states, along with partisan efforts to adjust district lines before the November 2026 House elections. Ongoing litigation in several states, including challenges to racial or partisan gerrymandering claims, continues to shape final boundaries, while special primaries and ballot measures in places like Virginia and Utah add further uncertainty. These developments directly influence which maps election officials will administer.