Er, guys, I'd do the same thing. I don't want the press digging up my past (not that I have much if any to hide) because I made a comment to a political candidate.
So the guy's not perfect? Who cares! It's as if we all need some ego buildup from relegating the man's opinions to irrelevant because he doesn't conform to our image of the perfect, informed voter.
Obviously this makes just as much sense as a conservative using Joe the Plumber as a national icon.
The Left Declares War on Joe the Plumber by Michelle Malkin on National Review Online