The map of congressional districts imposed by Pennsylvania’s high court for the state’s 2018 elections puts Beaver County in a new 17th Congressional District with much of Allegheny County, while Lawrence County would be in a 16th Congressional District stretching to Erie. The new map also gives Democrats a boost in their mission to wrest control of the U.S. House. Republicans have vowed to immediately challenge it in federal court, perhaps as early as Tuesday. The map of Pennsylvania’s 18 congressional districts takes effect for the May 15 primary and substantially overhauls a Republican-drawn congressional map widely viewed as among the nation’s most gerrymandered.