by Nicholas Beaudrot of Electoral Math
Survey USA now has lots of head-to-heads. I'm going to do a condensed table, where each entry gives the margin of victory of Clinton/Obama/Edwards against Giuliani/Romney/Thompson for each candidate:
First off, we should all be praying for an John Edwards-Mitt Romney matchup, which at first blush would appear to put the entire country into play, though that may be partially due to Romney's low name recognition.