What to expect in Pennsylvania’s primaries

Democratic voters in Tuesday’s Pennsylvania primary will pick their nominees to flip four seats seen as critical for the party to retake the U.S. House in November. Republicans hold a slim House majority, and just a handful of seats could determine whether they continue to control the chamber next year. Democrats see four competitive Republican-held districts in Pennsylvania as among their top pick-up opportunities. U.S. Reps. Brian Fitzpatrick in the 1st Congressional District, Ryan Macke...