The cognoscenti seems to have arrived at the belief that the New York Times story was planted by or somehow originated from former McCain chief strategist John Weaver, who left the campaign in June after a dispute with McCain over the direction of the campaign. (Tucker Carlson on MSNBC called Weaver "sinister.")
Weaver did speak for the story, and he, apparently, was the only former McCain aide to do so on the record. Ergo, he's a suspect; channeling our armchair psychoanalysts, he somehow wants to get back at his boss.
This is highly unlikely.
First, the Times began to report the story before Weaver left the campaign.
Second, having had many conversations with Weaver before and after his break with McCain, it's clear to me that he retains enormous affection for his former boss; his primary emotion is one of sadness and not vindictiveness. I could be reading Weaver wrong, but I don't think I am.