Anyone who has an opportunity to arrest Soros, for any and everything that can be found, should be done. Try using his methods against him. Make him show up in some court at least once per week for the rest of his life..also, go after his children, as they have done against Trump. Keep the pressure on in a like manner. Turn Saul Alinsky on them.
Where does Soros have his residence? That would be the way to get at him, through state law. Also, if he lives in a Blue state, if he travels to a Red one then he could be arrested there.