'Bumbling mafia don': legal expert explains how Trump made the prosecution's case stronger
President Donald Trump (image via Nicholas Kamm/AFP).

Donald Trump acted like "the most bumbling mafia don in the history of mafia dons" when he coordinated the obstruction alleged in the confidential documents case, national security attorney Brad Moss said Friday night.

Moss, who said on Thursday that Trump is facing the legal challenge of his life with a legal team that isn't up for the job, was part of a panel discussing the case on MSNBC's The Last Word with Lawrence O'Donnell. Moss accused Trump of "showing off documents" and being careless in other ways.

"He's talking about it to a staffer from the political action committee. He's talking about it to the ghost writers of Mark Meadows," Moss said. "He's getting these subpoenas and acting like the most mafia don in the history of mafia dons. He was joking and talking to his lawyer like, can we say that we don't have anything?"

No, Moss said, you either "comply with the subpoena or move to quash it."

"You don't say, how do I lie? That is what is so dangerously concerning with this indictment," he added.

Moss further noted that Trump is presumed innocent, but added that, "if we do get the trial, I don't see much of a reason to believe that they won't be able to make their case."

"I don't see a lot of substantive defense that Donald Trump will make at trial," according to Moss.

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