Okay, a word of caution here—Michael Cohen, Donald Trump's former lawyer/fixer, is not exactly "cooperating"... yet. What is happening is that he's reportedly talking with the special counsel's team now, in an apparent effort to determine what he has to contribute to the Trump/Russia probe. Vanity Fair's Emily Jane Fox writes:
In recent weeks, it has also become common knowledge among close friends of Michael Cohen, Trump’s former personal attorney, that Cohen is talking to the Mueller team, according to people familiar with the situation.
The extent and purpose of those talks is not entirely clear.
Cohen, through his lawyer Lanny Davis, has practically been begging to cooperate with Robert Mueller's investigation ever since he pleaded guilty to eight criminal counts involving financial fraud last month. Following Cohen's plea, Davis went on a 24-hour-plus media tour suggesting that Cohen had plenty to dish about Trump and he wanted to dish it.
The most reasonable conclusion about Cohen's communication with Team Mueller, then, is that prosecutors are trying to determine what he can definitively add to their investigation.
Helluva Friday here ... stay tuned!