Yale forensic psychiatrist Bandy Lee, who famously diagnosed Donald Trump with narcissistic personality disorder, is now suggesting that Harvard law professor Alan Dershowitz, a conspicuous critic of claims that the president is guilty of obstructing justice or other impeachable conduct, suffers from the same mental disorder. Not only that, Lee says on Twitter, but "just about all of Donald Trump's followers" suffer from a "shared psychosis"—a pseudomedical conclusion that nicely illustrates how Lee and like-minded Trump critics try to shut down political debate by portraying their opponents as mentally ill.