Perpetually Parsing Politics
So how about this? It is a curious thing the divergence between Sestak and Onorato across the state. Not having statewide data, can only do this within the county. Here is a map of the difference between Sestak and Onorato results on Tuesday. I thought there would be some clear pattern, but as much as I fiddled with it, I really couldn't get anything to pop out of the map. Maybe there is something to be said for the lack of pattern. Hopefully I have this labeled well enough to be self explanatory. Blue is where Sestak did better than Onorato and red is where Onorato did better than Sestak. Within +/- 2 percentage points I left white.
Just about the only think that has some stylized fact to explain it is the block there in Shaler that may come from it being Corbett's home district resulting in some pull from Onorato there. Beyond that, looks relatively uniform to me.