Here's the problem nowadays, the Republican not only has to mitigate Philadelphia County, but also Delaware and Montgomery Counties. (Bucks still retains its close to state average status, but that could change).
Montgomery County PA is quite interesting indeed, only county to vote Republican in Bob Casey Sr's 1990 66 of 67 county landslide.
(Hi everyone, remember me?)
Yes I remember you! Have you seen Keystone Phil or Jake?
I noticed you left Chester County off the list. I was disappointed when it swung back to Romney in 2012. Its also a big suburban county but much more Republican than Montgomery or Bucks.
Can anyone expound on the differences twixt Westmoreland and Butler Counties? I get the sense the latter is more white collar and the former is more blue collar.