A problem bigger than Van Jones himself:
NY MAGAZINE.com: "OBAMA HIRED A 9/11 TRUTHER, FOR SOME REASON" (SNIPPET: "It turns out this Van Jones character was either not vetted at all, or vetted but seemingly without any concern for the skeletons that turned up (which really defeats the purpose of vetting in the first place).") (September 4, 2009, 10:35 am)
Well, no one vetted BO (he and his controllers made sure of it), so it's not at all surprising he won't let anyone else vet the people he appoints as his "czars."