Disagree with those who think Trump was trying to intimidate the Court today. [View all]

Hard to intimidate Justices who have lifetime appointments. And he almost certainly was advised in advance that the chances of his executive order being upheld were slim.
I think his appearance was purely performative political theater. If any other president had ever shown up for an oral argument, he wouldn't have bothered, but the temptation to be the "first" to do something is irresistible to him. Plus, he was playing not to the justices but to his MAGA faithful -- showing them how much he believes in his war on immigrants.