A rapid trial over North Carolina’s new congressional and legislative districts has concluded with arguments over whether the boundaries contain unlawful gerrymanders that must be replaced. The three trial judges now have until Tuesday to rule, the result of a directive by the state Supreme Court. The justices delayed the March primary until May in the meantime. The plaintiffs' lawyers said Thursday that the maps approved by the General Assembly include illegal partisan and racial gerrymanders and must be redrawn. Republican legislative leaders say the boundaries are lawful and the maps' challengers failed to explain exactly how much partisanship in line-drawing is too much.