The Pennsylvania Valley That Became A Bellwether For Trump

It’s tempting to think that Pennsylvania’s political map is settled in this presidential election year. And it’s true that the state’s northeastern and southwestern coal regions, once Democratic, are set to reward Donald Trump again. Philadelphia’s “collar” counties, meantime, will continue their Republican purge. But the outcome of this battle of the voting margins—working class versus suburbanite—still remains unpredictable.

The Lehigh Valley, the most populous region between Philadelphia and Pittsburgh, will prove the bellwether in this fight. Its cities and towns have already had an understated yet immeasurable impact...