My hunch is that McCain has his fingers in this too as it fits his MO.
We'll see what unfolds hee soon.
A few folks in the conservative media have actually traced some of the anti-Palin smears back to senior McCain folks (I remember seeing something to this effect on the Corner), but I don't know whether these folks are just trying to deflect the blame from themselves, or whether it comes from McCain, himself.
However, the stuff from the Fraudney camp wouldn't make any sense if it didn't come from Fraudney, himself. The McCain staffers need a scapegoat to blame for their own incompetence. The Fraudney folks don't have a similar need.
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