An attorney representing Michael Cohen called out President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE's lawyer Rudy Guiliani on Monday, questioning he and the president's understanding of the truth.

Lanny Davis, who joined Cohen's legal team last week, mocked Giuliani and President Trump over their definition of the "truth."

"Did @ rudygiuliani really say on Sunday shows that @ michaelcohen212 should cooperate with prosecutors and tell the truth?" tweeted Davis. "Seriously? Is that Trump and Giuliani definition of 'truth'? Trump/Giuliani next to the word 'truth' = oxymoron. Stay tuned. # thetruthmatters."

Did @rudygiuliani really say on Sunday shows that @michaelcohen212 should cooperate with prosecutors and tell the truth? Seriously? Is that Trump and Giuliani definition of “truth”? Trump/Giuliani next to the word “truth” = oxymoron. Stay tuned. #thetruthmatters — Lanny Davis (@LannyDavis) July 9, 2018

Davis, a contributor to The Hill, made the statement just a day after Guiliani said that Cohen, Trump's longtime personal attorney, should cooperate with special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE in his investigation into Russian meddling in the 2016 presidential election.

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“Michael Cohen should cooperate with the government. We have no reason to believe he did anything wrong,” Giuliani said on ABC’s “This Week." “I have no concerns that Michael Cohen is going to do anything but tell the truth."

Speculation that Cohen might turn on Trump increased last week after an interview he gave ABC, in which he said his first loyalty was to his family and not the president. Cohen is currently under investigation in the Southern District of New York for bank fraud and campaign finance violations.

Cohen's legal team also ended a joint defense agreement with Trump's lawyers.

Davis, who currently works as a legal crisis manager, is a former White House official from former President Clinton's administration.

“Michael Cohen deserves to tell his side of the story — subject, of course to the advice of counsel,” Davis, who served as White House special counsel under Clinton, said in a statement to The New York Times.

Davis's shot at Trump and Guilani comes as the investigation into Cohen intensifies. The same week he hired Davis, prosecutors gained access to more than 1 million documents that were seized in an April FBI raid of Cohen's office, home and hotel room.