Geraldo Rivera called Michael Cohen "full of crap" Friday on "Fox & Friends" after President Trump’s former attorney and fixer told ABC News that the president knew hush-money payments to Stormy Daniels and Karen McDougal were wrong.

In an exclusive interview with George Stephanopoulos on "Good Morning America," Cohen said Trump was "very concerned" about the effect on the election if Daniels and McDougal revealed their allegations of past affairs with him.

“I knew what I was doing was wrong,” Cohen said. “I stood up before the world [Wednesday] and I accepted the responsibility for my actions.”

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Cohen was sentenced to three years in prison Wednesday for a range of crimes, including tax evasion, campaign-finance violations and lying to Congress.

When asked by Stephanopoulos if Trump knew it was wrong to make the payments, Cohen replied, “Of course,” and added that the purpose was to “help [Trump] and his campaign.”

FULL PART 1: "I'm angry at myself, because I knew what I was doing was wrong," Michael Cohen tells @GStephanopoulos. https://t.co/sTCn23S6sb More of the exclusive interview is just ahead on @GMA. pic.twitter.com/6X1CNcvWDx — Good Morning America (@GMA) December 14, 2018

Rivera reacted on "Fox & Friends" by emphasizing that federal prosecutors were at times "extremely unsatisfied" with Cohen's cooperation.

"It seems to me that Michael Cohen is trying very hard to be the John Dean of the Trump White House," said Rivera, referring to Richard Nixon's former White House counsel who was involved in the Watergate cover-up and later testified against Nixon.

"He wants to be the king rat, he wants to be the chief snitch who takes down Donald Trump," said Rivera, adding that Cohen's testimony puts Trump in "real peril" legally.

Rivera called Cohen a "serial manipulator and a con man" but noted that Cohen is alleging that Trump directed the payments with the election in mind, not to shield his wife and family from embarrassment.

"I think Michael Cohen is the president's worst nightmare. I thank goodness that a sitting president cannot be indicted. It is pretty clear that Michael Cohen is on a mission to take down the president," he said, adding it's difficult to assess whether Cohen has been truthful with all of his statements.

Rivera called it "disturbing" that Trump is facing his "most grievous peril" from something that has nothing to do with collusion with Russia.

"Where is the collusion? Where is Russia? If not for Russian collusion, you never would have had Robert Mueller, you never would have had this situation," he argued.

Watch the full segment above.

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