"no named sources."
Yes and no. The article doesn't name the callee, but does name the caller:
"the conservative political consultant said that he had received such a query from Sara Taylor, director of the Office of White House Political Affairs."
Who denied it. Not much of a source. I could call James Carville and say, "Do you support Bush?" He'd say no, and I could go public and say, "I spoke to Carville, and while he denies it, he told me . . . ."