Just for the sake of argument, let’s say McCain pulls out PA (although we’d still say the odds are against this), with all the other ‘decided’ states playing out as currently polling.   This would leave Obama with 265 and McCain with 178.   There are two combinations that would get McCain over the top — he would have to win 7 of the 8 swing states.

By the way, for those that haven’t seen it, anytime your interactive map has 12 or fewer states undecided with neither candidate at 270, you will see a feature called “The Road to 270″ below the map.  This will summarize what each candidate needs to win and it will provide a link to a page (like the ‘two combinations’ link earlier in this post) where you can see every critical path to 270 electoral votes.