There’s a lot that Trump doesn’t know, but whether or not he has to adhere to the US Constitution shouldn’t be one of them.

President Trump — when asked if he thinks he needs to uphold the Constitution on “Meet the Press with Kristen Welker” — said, “I don’t know,” but added that his lawyers “are obviously going to follow what the Supreme Court said.”

Dude. You can say you don’t know what’s on the menu for dinner tonight, but you can’t go saying you don’t know whether you have to uphold the Constitution or not. It’s like not knowing how to apply the brakes when you drive a car.

The response came after a series of questions regarding the right to due process for people living in the United States and the Fifth Amendment. During this exchange, Trump said he wants to deport millions of undocumented immigrants — who]m] he called “some of the worst people on Earth.”

“I was elected to get them the hell out of here and the courts are holding me from doing it,” Trump said.

So how does he know they’re some of the worst people on earth? The one thing he knows they have in common is that they’re undocumented. How does he get from there to “some of the worst people on earth”?

He doesn’t, because he can’t. It’s a non sequitur. He doesn’t know what a non sequitur is. If he did, his way of talking would be radically different.

Welker then pressed Trump on whether he, as president, needs to abide by the Constitution and the rights it provides to people in the U.S.

“I don’t know,” Trump said. “I have to respond by saying, again, I have brilliant lawyers that work for me, and they are going to obviously follow what the Supreme Court said. What you said is not what I heard the Supreme Court said. They have a different interpretation.”

Wrong answer. This time not a non sequitur, just a wrong answer. What is the right answer? “Of course the president has to abide by the Constitution.” Answering “I don’t know” is not, repeat not, acceptable.

That doesn’t matter to him, of course, or to the army of toads who do what he tells them, but it matters in general. It matters to history; it matters to the record; it matters to whether or not the US goes full dictatorship.

Later in the interview, Trump refused to rule out the use of military force on Greenland and said, “it could happen.”

“We need Greenland very badly,” he said. “Greenland is a very small amount of people, which we’ll take care of, and we’ll cherish them, and all of that. But we need that for international security.”

Mm. Great. Very reassuring. When you’re grabbed off the streets and locked in a dungeon it’s a huge relief to be told your captors are going to cherish you, and all of that.