A disbarred, serial perjurer walks into a courtroom and asks to take an oath . . . No, seriously, this is not a joke. Michael Cohen will soon appear in a Manhattan courtroom in what is sure to be one of the most bizarre moments in legal history.

Cohen nearly comprises the prosecution's entire case against former President Donald Trump under a criminal theory that still has many of us baffled. It is not clear what crime Trump was supposedly trying to conceal by making "hush-money" payments to former porn actress Stormy Daniels.

What is clear is that none of the witnesses called in recent weeks has had any direct involvement with Trump on the payments.

The witnesses had a lot to say about Cohen, and most of it was not good. They described an unprofessional, self-proclaimed "fix-it man" who created a shell corporation to buy out Daniels with his own money. The money was later paid back by Trump after the election, with other legal expenses.

So Cohen will now make the pitch to the jury that they should put his former client in jail for following his own legal advice.

This would be difficult even for a competent and ethical lawyer. For Cohen, it is utter insanity. But Bragg is betting on a New York jury looking no further than the identity of the defendant to convict.

Cohen has an impressive history of lies and exaggerations that may be unparalleled. Just weeks ago, another judge denounced him as a serial perjurer who was still gaming the system.

This is not the defendant, mind you, but Alvin Bragg's star witness.

I have been an outspoken critic of Cohen going back to when he was still representing Trump. His unethical acts were matched only by his unprofessional demeanor.

In 2015, after students on the Harvard Lampoon played a harmless prank on Trump, Cohen was quoted by a student on the Lampoon staff as threatening them with expulsion.

When a journalist pursued a........

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