Last summer, when Donald Trump began pressuring GOP-controlled states to redraw their congressional maps mid-decade, Republicans had a lofty goal: pick up a dozen or more seats in an effort to fend off a coming blue wave and retain the House in the midterms.

Trump scored early wins in Texas, Missouri, and North Carolina. But the gerrymandering arms race he started hasn’t resulted in the lopsided victory the White House envisioned. The approval by voters in Virginia on Tuesday of a new congressional map that could net Democrats up to four new seats shows how Democrats have fought Trump to a surprising draw in the redistricting wars.

Right now, the parties are basically even in the states that have redrawn their maps since last summer. The new map in Virginia makes it even more likely that Republicans will lose the House in November, given Trump’s tanking approval numbers and the fact that Cook Political Report forecasts that Republicans have to win........

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