Washington (CNN) President Donald Trump's attorney, Rudy Giuliani, said Sunday that he isn't concerned about Michael Cohen potentially cooperating with federal prosecutors.

"I don't know what he has to flip over," Giuliani said of Cohen, Trump's former personal attorney, on CNN's "State of the Union." "What I do know is there is no evidence of wrongdoing with President Trump. So we're very comfortable. If he believes it's in his best interest to cooperate, God bless him. He should cooperate. I think the man has been horribly treated by the people he's going to cooperate with, but sometimes you have no other choice."

Giuliani also said that if Cohen tells the truth, "we're home free."

The comments follow an interview Cohen had with ABC News last week in which he suggested that his loyalties had shifted.

Although he had once famously said that he would take a bullet for his boss, Cohen told ABC News, "My wife, my daughter and my son have my first loyalty and always will. I put family and country first."