They showed up in similar circumstances before. Now they are not showing up.Most likely working.
It used to be fun to be a Trump supporter. You could dress up in fun costumes, scream at the world that let you down, and pretend you had a super hero who had special powers that would make things better. It's not fun to watch your hero be found liable for fraud, be stripped of his prize business assets, and sit in court as the people who are really in charge decide what his additional punishments will be.
And in response to all this, what is our hero saying? "Witch hunt." "Deranged judge." Politically motivated prosecutors." "I've done nothing wrong." The same old stuff he's been crying for years.
Now that the trials are beginning, it's not working any more (if it ever did). And it's not fun to be MAGA any more either.
That is why the plaza is empty.