Obama can't win Pennsylvania. It's just one of the states that Clinton is favored in. He should downplay it and focus chiefly on winning Indiana and North Carolina two weeks later.
Solid strategy, downplaying the state that is actually going to matter in the general, in favor of those that aren't.
I've never understood this argument. We have two options to use as a guideline for General performance:
1. A closed Democratic primary, where Clinton leads
2. Polls specific to the General Election, where Obama performs modestly better.
Why so readily #1 over #2?