Because demanding he step down certainly wouldn't be on the table. The bar isn't just "stop Trump".
This 👇is better than Trump and the Dems are complete okay with it (Except for TC OX, he's Twisted Sister-type pissed):
But it is NOT what is good for our country. Why are you not angry? If Americans ever needed to protest, it's now. 9/11 was our last unifying event, this election should be the one thing that brings both parties together, 258 million Americans pissed off demanding better.
Nothing will happen, though. Everyone will walk like emotionless sheep into the polling station and mark blue or red and drive home completely unphased.