Why do Democrats forget that we are a Constitutional Republic, not democracy?

It could be all the voting.

Whatever -- at least they remembered that it wasn't meant to be a dictatorship , so got rid of Trump .

they hate the Constitution. Obama and Biden are using it for toilet paper. they want America to be a socialist/communist regime, where the Washington elites are in charge and everybody else gets scraps. case in point, this 1.9T "stimulus" bill. 

That's what the fascist scum keep telling us.

Republicans want to turn us into a plutocracy.

Why do you think Democrats don't know that? 

They never learned that in the liberal government union public schools.

Because they are unteachable