Clinton +10 counties:
Biden 68
Trump 26
Swing counties (margin is less than 10 points):
Biden 54
Trump 35
Trump +10 counties:
Trump 55
Biden 40
The Trump +10 counties number is the most interesting for me. The most Clinton-leaning Trump county was Beaver county, and they voted for Trump by 19 points. If the average is only Trump +15, then we could be seeing some crazy swings.
Beaver voted for both Casey and Wolf as well. Cumberland, Lancaster, and Luzerne are other counties that could be interesting when results come in. Trump should win all four, but the swings could be very interesting.