The former president complained that his sentencing is set to take place days before the Republican National Convention
Donald Trump says he wants the Supreme Court to intervene in his upcoming sentencing on 34 felony counts of falsifying business records.
“The ‘Sentencing’ for not having done anything wrong will be, conveniently for the Fascists, 4 days before the Republican National Convention,” Trump wrote Sunday night on Truth Social, complaining that Judge Juan Merchan was an “‘Acting’ Local Judge, appointed by the Democrats, who is HIGHLY CONFLICTED” to “make a decision which will determine the future of our Nation.”
“The United States Supreme Court MUST DECIDE!” Trump added in an appeal to the nation’s highest court.
https://www.uscourts.gov/about-federal-courts/types-cases/appeals
A litigant who loses in a federal court of appeals, or in the highest court of a state, may file a petition for a “writ of certiorari,” which is a document asking the Supreme Court to review the case.
So yes, they can’t do it until all normal avenues are exhausted. I’m not sure it is required to have anything to do with federal law though.