"I don't know if it's a smoking gun or how decisive it is," Cohen's lawyer Lanny Davis told CNN.

In the wake of Michael Cohen's guilty plea to eight criminal charges, which could land him in jail for nearly six years, his lawyer says he would not accept a pardon from U.S. President Donald Trump.

"I do believe that he has information about Mr. Trump that would be of interest both in Washington and in New York City," Cohen's lawyer said.