As California and Texas scramble to redraw U.S. House maps before the 2026 midterm elections, the race is underlining redistricting’s big role in determining political power.

Texas took action after President Donald Trump directed Republican-controlled states to change where the district lines are drawn based on where the population is likely to vote Republican — a practice known as partisan gerrymandering. California Democrats were poised Thursday to approve their redrawn congressional map in response.

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