Another McCain surrogate stumbles on economics

So Mark Sanford, a potential McCain VP pick, was unable to come up with any economic policy differences between McCain and George W. Bush:

BLITZER: Are there any significant economic differences between what the Bush administration has put forward over these many years as opposed to now what John McCain supports?

SANFORD: Um, yeah. For instance, take, you know, take, for instance, the issue of -- I'm drawing a blank, and I hate it when I do that, particularly on television. Take, for instance the contrast on NAFTA. I mean, I think that the bigger issue is credibility in where one is coming from, are they consistent where they come from.

Story and video here.