I happened to notice the list of states in which Romney is discontinuing ad buys--and the states that he's doubling down on. I started doing a bit of research, and haven't finished, but this is what I preliminarily noticed:
Pennsylvania is one of the nixed states. So is Michigan. Romney is behind in Michigan and is not expected to win. PA gets a bit trickier. Romney is behind -- but, as we all know, this voter-ID legislation is pending.
After looking at this information on the OP, I can understand why Romney may feel that PA is a lost cause. It's highly probable, and I'm sure they know this--that the ruling won't be in favor of voter ID/voter suppression. The Romney campaign knows more about what will likely happen than we do, based on all of the legal and campaign experts with which he surrounds himself. Also, they probably know these judges and how they rule---and if they can be manipulated. All kinds of info. My guess is that they know PA voter ID laws aren't going their way. So they pulled out--because they no longer can rely on voter-suppression to win the day for them.
It looks like most of the states that Romney is doubling down in--are states that have pending voter ID laws. Isn't that incredible??? I'm still looking at this and I'm sure others are as well. It appears that they realize that their only hope is to squeak by in states that that have tight races (or where they're slightly behind) and allow voter suppression take care of the rest.
It's enough to make you want to hurl.