What did Donald Trump do today?

He joked about sending American criminals to foreign prison camps, forgetting that he is one.

At a joint White House press conference today, Trump and El Salvadoran president Nayib Bukele both confirmed at a joint press conference today that neither would take any action to obey a Supreme Court order to return a Maryland man mistakenly deported to El Salvador.

This was expected. Trump and Bukele have both openly mocked American judges seeking to enforce the Constitution's due process requirement, and continued to do so today. Trump and some of his staff today pushed harder on the false claim that the Supreme Court actually ruled in their favor in the Abrego Garcia case, permitting them to take no action. (It did not.)

Prior to the event, Trump laughed as he discussed his plans to send American citizens to Salvadoran supermax prisons like the notorious one Abrego Garcia was sent to, saying "Homegrown criminals are next. I said homegrowns are next, the homegrowns. You've got to build about five more places, all right? It's not big enough." 

Trump returned to the theme during the press conference, insisting that he was serious and that he was "looking into" the legality of doing so. It is flatly illegal, but then so was the disappearance of Kilmar Abrego Garcia, who was under a judicial order preventing his deportation to El Salvador, and who has never been charged with or accused of any crime.

By contrast, Trump is himself in every legal sense an American "homegrown criminal." 

Why does this matter?

• Siding with a foreign dictator against the American justice system to deny an innocent man due process of law is about as big a betrayal of a president's oath of office as there is.

• Presidents who live in glass prisons shouldn't throw stones.