It will not stop unless it is stopped by force.
And who legally has that authority? And by force means what?
This matter has moved far, far beyond questions of “legal authority”.
Congress has legal authority to remove the President under certain circumstances.
When they remove THIS President, it will be most unclear whether or not those circumstances have been proven or even alleged in a coherent way.
This will cause dissension among the men with the guns, and then, who knows what happens.