A legal expert lost his cool on MSNBC on Monday night after President Donald Trump announced he fired Federal Reserve Governor Lisa Cook, effective immediately, citing mortgage fraud allegations from his administration.

Norm Eisen, the founder and chair of the Democracy Defenders Fund, joined "The Weeknight" to discuss Cook's firing, a historic and unprecedented move that is expected to trigger court challenges, as Federal Reserve governors can only be removed “for cause."

Cook previously denied wrongdoing and said she had no intention of resigning.

MSNBC host Michael Steele, former chair of the Republican National Committee, noted Trump's decision to "summarily fire a Fed board member" comes in the "face of the fact that this body relates its history back to the early days of the founding of this country."

"Alexander Hamilton, Mr. President, you may recall him ... very bright lines were drawn with respect to the banking relationship between the Reserve and the government," said Steele.

Eisen said this firing was unlike other cases pending final disposition at his organization.

"We’re litigating some of them about the extent of the president’s firing power. And the Supreme Court said so in the Gwynne Wilcox case that the Fed is different," he emphasized, referring to a major legal battle over Trump's attempt to oust a member of the National Labor Relations Board without showing cause.

Eisen attacked the president in a fiery takedown.

"But Donald Trump doesn’t care about the Constitution! He doesn’t care that Congress has said you can only fire somebody for cause! He doesn’t care that he has no cause here!" he exclaimed.

Eisen asserted Cook's firing was based on a social media post by one of his "most-sharp partisans," Bill Pulte, head of the Federal Housing Finance Agency.

"This is irrelevant to him. You have somebody in the White House who himself is a convicted felon. Thirty-four counts. No wonder the federal courts have shot him down 200 times for illegal actions. This is another one," Eisen continued.

Eisen then asked Steele to hand over his copy of Trump's letter to Cook announcing her termination.

"And you know what? Remember — can I have that letter? This is Donald Trump’s letter," he said. "Do you know what Lisa Cook should do? What Nancy Pelosi did. She should tear that letter."

Eisen tore the letter in half and handed it back to Steele.

"Now you’ll need to tape it for the rest of the segment," he concluded.

Watch the clip here or at this link.