Sworn Donald Trump enemy John McCain admitted Wednesday that he passed the dossier of claims of a Russian blackmail plot against the president-elect.
The Arizona senator issued a public statement amid mounting questions of his exact role in the affair - and how a document riddled with errors and unverifiable claims came to be published.
'Late last year, I received sensitive information that has since been made public,' he said.
'Upon examination of the contents, and unable to make a judgment about their accuracy, I delivered the information to the Director of the FBI.
'That has been the extent of my contact with the FBI or any other government agency regarding this issue.'
But the 2008 Republican loser, who disowned his party's candidate weeks before the election, may have been far more intimately involved than that.