What did Donald Trump do today?

He asked if he could get the Supreme Court's first ever do-over.

Still fuming over the Supreme Court's decision to strike down the taxes Trump illegally imposed based on a "national emergency" only he could see, Trump posted a legal question to his private microblogging site today: 
 

The recent Decision of the United States Supreme Court concerning TARIFFS could allow for Hundreds of Billions of Dollars to be returned to Countries and Companies that have been “ripping off” the United States of America for many years to come, and now, according to this Decision, could actually continue to do so, at an even increased level. I am sure that the Supreme Court did not have this in mind! It doesn’t make sense that Countries and Companies that took advantage of us for decades, receiving Billions and Billions of Dollars that they should not have been allowed to receive, would now be entitled to an undeserved “windfall,” the likes of which the World has never seen before, as a result of this highly disappointing, to say the least, ruling. Is a Rehearing or Readjudication of this case possible???

No.

Losing parties in court can appeal verdicts to the Supreme Court, but after that they don't get to keep appealing until they get the verdict they want, because there is no higher authority than the Supreme Court on legal questions, including the president. The law and its interpretation change over time, but nobody—ever—gets to demand an immediate do-over just because.

Most Americans learn that much in elementary school, but there is a reason Trump might be confused. As a private citizen, Trump used the literally thousands of civil lawsuits he was a party to (as plaintiff or defendant) as a sort of bludgeoning tool, betting that he could drag out proceedings long enough that less wealthy opponents would be forced to settle on his terms. One judge even called him "the mastermind of strategic abuse of the judicial process."

Trump was notorious for this during his failed real estate career, suing contractors on a pretext to avoid having to pay workers for jobs they'd already completed. That tactic worked almost as well in criminal court: he was only convicted in one of his trials before his return to the presidency saved him from prosecution on other pending matters—at least for the moment. And even the 34 criminal counts that he was found guilty of by a jury yielded no actual sentence, for the same reason.

And, whether or not Trump really didn't know what a third-grader knows about how the Supreme Court works, he's using the same strategy with the tariffs case. Late today, his administration filed a motion with a lower court asking for a delay of at least four months before it had to begin answering requests for refunds of Trump's illegally collected taxes.

Why does this matter?

• Presidents should have at least a middle-school understanding of how the legal system works.