Hours after California voters approved a redistricting measure that would flip as many as five House seats for Democrats next year, California Republicans filed a lawsuit on Wednesday morning challenging the new maps. The suit, filed in the U.S. District Court for the Central District of California, argues that the new maps are unconstitutional because they improperly use voters’ race as a factor in drawing districts and asks the court to block them from taking effect. The lawsuit came the morning after California voters approved the redistricting measure, Proposition 50, which Gov. Gavin Newsom pushed to retaliate against gerrymandering that leaders in Texas and other Republican-led states approved at the request of President Trump.