Stewart says the Oct. 30 rally is for people who think the loudest voices shouldn't be the only ones that get heard.
Obama raised the subject of the rally during a round-table Wednesday with residents of Richmond, Va.
Obama said he was "amused" by Stewart's rally and that it's for people who expect some common sense and courtesy in their daily interactions.
The president said that having those voices lifted up is, as he put it, "really important."
