I just read that PA is one of the states where Obamacare hikes are going up significantly--Trump should hit on this continuously, right up to Election Day!
One thing about PA is that early voting is a negligible factor. Not easy to do here. So if he’s going to do a push here, it can wait until closer to the end so he can spend time and money elsewhere in the meantime.
Also, if there is a late surge for him in support nationwide in the last week then PA could be the prize that results from it.