A federal three-judge panel on Wednesday allowed California to use a new voter-approved U.S. House map that is designed to boost Democrats in the 2026 midterms. In a 2-1 ruling, a three-judge panel in Los Angeles denied requests from state Republicans and the U.

A panel of three federal judges in California declined to halt the state’s new congressional map Wednesday, rejecting claims the new lines were racial gerrymanders and allowing the map for this year’s...