One in 10 U.S. voters face new congressional districts

Voting boundaries for the upcoming midterm elections have shifted in nine states, altering the congressional districts for approximately one in 10 potential voters nationwide. This change follows a mid-decade redrawing process that concluded more than a year after President Donald Trump urged Republican-led states to redraw their maps in July 2025.

An Associated Press estimate places the number of affected voters at a substantial portion of the electorate. In Texas, more than 6.9 million potential voters will cast ballots in new districts. California, which adopted new lines to counterbalance potential gains in Texas, will see over 6.3 million voters in changed districts. Florida will see more than 4.5 million voters affected, while a state court decision in Utah resulted in new district numbers for about 69% of its potential voters.

The redistricting cycle began with Texas, the first state to adopt new U.S. House districts following the presidential directive. Democratic-led California subsequently implemented new districts intended to offset Republican gains. Several Southern states joined the effort after a U.S. Supreme Court ruling in April weakened federal Voting Rights Act protections for districts with large minority populations. A separate Supreme Court decision recently resolved a legal battle in Missouri, ruling that the state must use the same map it employed in the 2024 elections.

Tennessee experienced significant ripple effects from the boundary changes. Republicans targeted the Democratic-held 9th Congressional District in Memphis for major alterations. This adjustment caused large population shifts in the 5th Congressional District, previously based in central Tennessee. As a result, seven of the state’s nine U.S. House districts ended up with new boundaries.