

No that seems likely.
Evidence that would damn them here being in a court record makes it admissible elsewhere for a crime that isn’t even prosecuted yet.
They’re cutting off their foot to save their leg, here, since this isn’t particularly secretive, seeing how we know about it.
No.
Of course even the president has a right to due process, but no. If the president commits treason, he doesn’t get to be immune to that. A trial is warranted and an arrest if found guilty is correct.
Yes, corruption could hypothetically rig such a trial. But a president immune from the consequences of his actions means there only needs to be one person corrupted to ruin a whole branch of government, instead of the hundreds it would take Congress to rig a trial.