The alleged source used by NEWSWEAK may not really exist. The idea for there being one may have been fabricated by NEWSWEAK.
Possibly?????
Not "possibly", but "probably". If he (the source) existed, the weasel Isikoff would have thrown him to the wolves already.
I believe the story was made up from the whole cloth, and that Isikoff deserves the Jason Blair Award for Infamy in Journalism.