He's wasting his time in PA. Look at the 1980 and 1984 presidential elections -- Reagan won NJ by a FAR greater margin than its neighbor.
Philly and, to a lesser extent, Pittsburgh, kill the GOP in PA.
The reason for that is Pennsylvania has more committed partisans and fewer swing voters than other states. Another thing to remember, Bob Dole came closer to winning in Pennsylvania than George Bush the Elder did. Pennsylvania has an unusual political mix: socially conservative and economically labor-liberal.