Giuliani: I don't know for sure if there was a spy inside the campaign, and neither does Trump

Cuomo noted several times that, with all of Trump’s resources, the president could find out whether his campaign was investigated if he really wants to, rather than peddling media speculation from Fox News. In terms of whether there actually was an informant, Giuliani said he didn’t really know.

“I don’t know for sure, nor does the President, if there really was one.”

The showdown continued as Cuomo grilled Giuliani over the White House’s claims that James Comey and Andrew McCabe are proof that the Russia investigation is rife with corruption. As Giuliani blasted Comey as a “damn liar” and a leaker, which devolved into a argument about the legality of the former FBI director’s actions, and whether his firing was the catalyst for Robert Mueller‘s investigation.