Sen. Dianne Feinstein Dianne Emiel FeinsteinSenators offer disaster tax relief bill Democrats back away from quick reversal of Trump tax cuts Congress must save the Postal Service from collapse — our economy depends on it MORE (D-Calif.) on Sunday said James Comey is not a "nut job," following a report that Trump used the term during a White House meeting with top Russian diplomats to describe the former FBI director.

“This is a horrible thing for a president to say,” Feinstein, the ranking member of the Senate Judiciary Committee, told CBS’s “Face the Nation.”

“Former Director Comey is no way, shape, or form a 'nut job,'” she added.

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Feinstein said Comey is a strong and principled man, but noted that she thinks he made a couple of mistakes while helming the bureau.

“The fact is he has been terminated but the reason for the termination has really not been ferreted out,” said Feinstein.

A report last week said that Trump, during a meeting in the Oval Office earlier this month, told two Russian officials that firing Comey relieved “great pressure.”

"I just fired the head of the FBI He was crazy, a real nut job," Trump reportedly said.

Feinstein argued that the reasons for Comey’s dismissal need to be “clear and distinct” for the American people.