A federal court gave final approval Thursday to the redrawn Virginia House of Delegates map that a court-appointed expert created to resolve the state’s long-running racial gerrymandering case. In a 2-1 opinion, judges for the Richmond-based Eastern District of Virginia ordered the state to adopt the map created by University of California-Irvine political science professor Bernard Grofman. The map could boost Democrats’ chances of taking control of the House later this year by tilting six GOP-held districts toward Democrats and imperiling the re-election campaigns of two top Republicans. Republicans had called Grofman’s map “legally indefensible,” saying it “attempts to give...