“The money would be better spent in PA, which is very winnible.”
Possible but not likely- the RCP average of Pennsylvania polls show Obama by 7.9%:
http://www.realclearpolitics.com/epolls/2008/president/pa/pennsylvania_mccain_vs_obama-244.html
However, Bush didn’t win Penn. so McCain doesn’t need to either. What we do need to do is hold serve in the big 3 states Bush carried: Ohio, Florida and Virginia. Hopefully, we can pick up New Hampshire, a Kerry state.
Doing all that would get us past the early part of election night in decent shape, with Iowa being the only Bush state that Obama picked up. Then we head out west with Colorado and Nevada deciding the election. If we lose any of Ohio, Florida or Virginia, it will be hard to recover.
PA does not want to vote for Obama. If McCain campaigns hard there, it can be had.