Nine states implemented revised congressional maps for the November 2026 U.S. House elections following an unusual wave of mid-decade redistricting. Republican-led legislatures in Texas, Florida, North Carolina, Tennessee, and Louisiana enacted new lines after a 2025 presidential request and the Supreme Court’s Louisiana v. Callais decision, aiming to adjust partisan balance. California voters approved a counter-map via Proposition 50 in November 2025. Ohio’s redistricting commission adopted updated boundaries, while court orders reinstated or altered maps in Alabama and Utah. Missouri’s legislative changes applied only to primaries, and Virginia’s effort was blocked. Most maps faced ongoing litigation over racial or partisan gerrymandering claims, yet remained in effect for the election cycle, with procedural deadlines and Supreme Court stays determining final use.