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Pennsylvania is not trending Republican.
Just look at the map.
The "T" is becoming even more solidly Republican.
The Democrats are losing ground in their traditional strongholds in the south-west and West. The Pittsburgh area itself is definatly trending Republican. While Republicans are losing ground in some areas around Philly, it isn't enough to off-set the trend in the rest of the state. Slowly, but surely, we are trending red (or blue in Atlas terms).
I don't think you understand the power of the Philadelphia area in terms of voting. You also have to consider New York/North Jersey residents moving into Northeast Pennsylvania. They are largely Democratic. PA is a push. I don't see a significant trend.
