It seems in some sense pointless to say anything more against Donald Trump’s venomous personal attack on Judge Gonzalo Curiel, who has the unenviable task of presiding over a law suit that calls into question the moral probity, intellectual rigor, and economic soundness of Trump University. Ironically, for all his talk about Curiel as “hater,” he has yet to ask Curiel to recuse himself from the case, knowing full well that a vicious personal assault is better than a groundless legal motion.

Before Trump began his ugly tirade against Judge Curiel, I was prepared to have an open mind about the merits of a law suit about which I knew, and continue to know, absolutely nothing. But now that Trump has decided to double-down on these scurrilous attacks, the easiest thing to do is to presume that a man who can so badly misbehave in public matters is likely to engage in the same dubious practices in his private business dealings. If Trump thinks that he has found a new way to run a presidential campaign, it speaks poorly to his own personal integrity and political judgment. His behavior against Curiel is the kind of onslaught that makes him unfit to govern. The entire episode is a nonstop travesty and should be condemned as such.

The situation is only worse because Trump, it appears, has decided to double-down on his offensive strategy in the face of huge amounts of criticism from all sides of the political spectrum, including key leaders in the Republican Party who have had to eat more than a modest amount of humble pie in order to remain loyal to the party. But his coarse speech that treats the merits of this case as self-evident shows that he has become a caricature of himself, willing to engage in the worst form of pyrotechnics in support of a vain and inglorious cause. He has become unhinged and perhaps delusional.