Trump just jeopardized his attorney-client privilege with this one stupid mistake: Former FBI official

The former chief of staff at the FBI explained how President Donald Trump may be committing a critical mistake in his legal defense against having conspired to commit felony campaign finance violations.

Chuck Rosenberg explained the blunder on MSNBC "Deadline: White House" with anchor Nicolle Wallace on Thursday.

"Donald Trump has been engaged in a day-long rolling, rambling and rage-filled commentary on his own legal fate and on the sentencing of his former fixer and lawyer," Wallace noted. "Coming in multiple tweets. his central contention is that he isn't a crook."

"The president not even able to keep his supporters at Fox News quiet about the clear and mounting evidence that he may very well face criminal liability in the cases out of the Southern District of New York which may explain his private concerns about impeachment as NBC News reports today," Wallace explained.

"By the way, this is only the latest iteration of his defense. As I recall, the first defense was, I have no idea what in the heck you're talking about, this never happened," Rosenberg noted. "So we're at a different defense and it's also unavailing."

"By the way, I think he's also -- he the president -- has also hinted there's an advice of counsel defense. And Dan [Goldman] knows this better than anybody, but there's a fascinating problem for the president," he explained. "If he really wants to travel down this path, which is if you are going to assert advice of counsel, you're also effectively waving any attorney/client privilege."

"Put aside the fact that advice of counsel defenses almost never work, the president may have just opened up a whole new avenue of hurt legally, if he really wants to assert that he relied on [Michael] Cohen," he continued. "I don't think that's going to work, and I don't think it's wise."

Watch: