Michael Cohen's attorney, Lanny Davis, says he's talking to lawyer who brought down Nixon.

He has been reaching out regularly over the past few months to John Dean, the former White House counsel who helped bring down the presidency of Richard Nixon.

I wanted to gain from John’s wisdom,” Davis told POLITICO.

“I certainly don’t want to raise expectations that Mr. Cohen has anything like the level of deep involvement and detailed knowledge that John Dean had in the Nixon White House as a witness to Nixon’s crimes, but I did see some similarities and wanted to learn from what John went through.”

https://www.politico.com/story/2018/08/19/davis-cohen-john-dean-788456