"The panel’s most aggressive move was not in the opinion itself, which is straightforwardly correct, but in the judgment that accompanies it on the docket. There, the panel gave the following directions regarding the ‘issuance of the mandate,’ a next step that must take place before Judge Chutkan can resume Trump’s criminal trial…”
“In effect, this means that Trump can only stop the issuance of the mandate by petitioning the Supreme Court for a stay pending a full application for certiorari, not by seeking rehearing either before the panel or the en banc D.C. Circuit.”
So, he only has one way to go.
The Supremes will not want to try and argue with such a detailed ruling. I will be surprised if they hear the appeal.
OTOH, if they do hear the appeal, it's proof that the fix is in. Even if they end up ultimately denying it, they will have delayed the trials to no longer matter.