Tomi: 'Wackadoodle' Liberals Turn to New Conspiracy Theory on Trump's Mental Fitness

Trump: I Would Beat Oprah But I Don't Think She Will Run in 2020

Attorney Alan Dershowitz blasted opponents of President Trump for bringing up the possibility of invoking the 25th Amendment to remove him from office. 

The Harvard Law School professor emeritus, a lifelong Democrat, said that the amendment was created to be a mechanism by which an incapacitated president could be removed from office.

Dershowitz: Mueller Probe Is 'Worst Possible Way' to Look Into Russian Interference

It was prompted by the 1963 assassination of President John F. Kennedy, but now some on the left argue it could be used to remove Trump because he is not mentally fit to serve.

The calls grew louder in recent days after the release of author Michael Wolff's tell-all book, which claims people close to Trump have doubted his mental health. 

Using the 25th Amendment would require two-thirds majorities in both the House and Senate.

Dershowitz said it's "irrelevant" to the situation today and a "fool's errand" for Democrats to even talk about it. 

"Now that they couldn't criminalize political differences, they're trying to psychiatrize political differences," he said, explaining that the conversation seems to be moving from allegations of crime against President Trump to claims that he's unstable. 

Dershowitz called it "dangerous," noting that authoritarian regimes throughout history have locked up dissidents claiming they were "crazy."

He said the American Psychiatric Association sets out that it's "wrong" for any doctor to diagnose a psychiatric condition without personally examining a patient.

A Yale University psychiatrist, Dr. Bandy Lee, recently briefed members of Congress on Trump's mental health, claiming Trump is “further unraveling.”

LOOK: Pelosi's Son Posts Photo With Ivanka at Mar-a-Lago NYE Party

Judge Nap's Emphatic Advice: Trump Should Never Agree to Interview With Mueller

Tomi Lahren Finds Out How Californians Feel About Living in a 'Sanctuary State'