What's stopping a Texas or a Florida DA from doing the same thing?

The absence of a crime committed in their jurisdiction.

Again, the flaw in this whole idea is neatly encapsulated in the following sentence from your quote:


There can’t be a single Democratic official in America against whom a criminal case can’t be brought that is better than this case against Trump.


That's the delusion - that every government official has committed a provable felony offense of which there is sufficient evidence to get through a grand jury and a motion to dismiss. That if Joe Biden were to retire to Wyoming, that there would be automatically be evidence of a state felony offense that Joe Biden had committed in Wyoming that the local Wyoming prosecutor could bring charges on.

It's the delusion that Trump didn't do anything illegal, but they convicted him, therefore it must be easy to convict people of crimes even though they didn't actually do anything illegal. The thought that Trump was susceptible to being convicted because he had done something illegal simply doesn't occur, so they don't see how or why Democrats could escape retribution....