When the trial occurred, Trump was only the presumptive Presidential nominee. Now, he is the actual nominee. Merchan, while utterly corrupt, would really be stepping in it to actually send the Republican nominee for President 1 month before the election. Maybe he will sentence him to prison on the day after the election, who knows. We will find out what kind of country we have when this occurs.
Where do you find “political parties”, “Presidential candidate”, or “running for President” in the Constitution?
Answer: You don’t.
Citizen Trump’s rights in Federal courts are just like yours and mine.
There is no direct route to ANY Federal court (never mind the USSC!) to appeal a jury conviction of a State crime.