How the redistricting fight has scrambled dozens of midterm campaigns across the country

The national redistricting battle triggered by President Donald Trump has cast a long shadow over the race for control of Congress next year — not only fundamentally shifting the House battlefield, but also creating a domino effect that’s shifting new candidates into new seats, ushering longtime members of Congress to the exit and exposing deep political rifts in state parties across the country.

The fight is still playing out across courtrooms, back rooms and Trump’s social media, as Republicans and Democrats tinker with district lines. Developments like this week’s federal court ruling blocking the new Texas maps from going into effect — leaving the ultimate decision to the Supreme Court — also show how much remains to be determined in the redistricting fight.

The battle kicked off whe