President Trump's push for Texas Republicans to redraw congressional lines ahead of next year's midterm elections has triggered a redistricting arms race. Democrats in California have already moved to counter Texas with a new map of their own, and leaders of both parties are intensifying similar efforts in states across the country.

In a more typical political climate, redistricting happens just once every 10 years. The burgeoning redistricting fight is instead happening mid-decade, and comes with control of the House in 2026 resting on a dwindling number of competitive seats.

Bipartisan warnings about the fallout from mid-decade redistricting often focus on the impact on voters in new districts losing responsive representation.

Other observers warn that more partisan congressional maps

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