They are counting on the Philly suburbs being flippable. IMHO, they should be working the Northeastern part of the state as well. Coal country is usually Dem leaning, but has gone for Republicans in Presidential years in the past, and with the war on coal, they will run some anti-EPA ads in the Scranton Wilkes-Barre area if they're smart (much cheaper ad-buy, though far fewer votes than the Philadelphia market.)
I wish the Scranton diocese and Johnston/Altoona archdiocese would have priests reading the episcopal letters being read out at Mass in Illinois this Sunday. OH and PA have very large ethnic Catholic populations and the Roman Church could help.