HARRISBURG, Pa. – Pennsylvania's high court issued a new congressional district map for the state's 2018 elections on its self-imposed deadline Monday, all but ensuring that Democratic prospects will improve in several seats and that Republican lawmakers challenge it in federal court. The map of Pennsylvania's 18 congressional districts is to be in effect for the May 15 primary and substantially overhauls a congressional map widely viewed as among the nation's most gerrymandered. The map was approved in a 4-3 decision. Most significantly, the new map likely gives Democrats a better shot at winning seats in Philadelphia's heavily populated and...