Nine states—Alabama, California, Florida, Louisiana, North Carolina, Ohio, Tennessee, Texas, and Utah—will use newly drawn congressional maps for the 2026 midterms following an unprecedented wave of mid-decade redistricting. The process began with Republican-led Texas enacting revised lines in a 2025 special session after presidential urging, prompting Democratic-led California to approve offsetting changes via a November 2025 ballot measure. The U.S. Supreme Court’s April 2026 decision in Louisiana v. Callais weakened Voting Rights Act constraints on race-conscious districting, enabling additional Republican-led states to redraw maps through legislative action or litigation resolutions. Ohio’s update stemmed from state constitutional requirements. Several maps face ongoing challenges, though current lines govern November contests in these states; Missouri reverted to prior districts after a September 2026 Supreme Court ruling.