Either it would be officially called off, or We The People would simply ignore it.
What police department wants all their officers tied up in endless jury trials, all of which end up in acquittal?
Politicians are going to have to try to get it front of this parade and pretend to lead or try to stop the stampede and be trampled.
The police have never been able to stop the justifiably angry citizenry when they rise up against tyrannical, dictatorial maniacs.
Ask Louis XVI and Marie Antoinette. Or Tsar Nicholas II
OH NO!!!! TORCHLIGHT PARADE!!!!! womp womp HOW DARE THEY?!?!?