David Gergen : President Obama 's stance on immigration is a troubling move . Gergen says Obama 's action is of questionable legality and sets a bad precedent . I want the parties to come together and ask Congress to set precedent , he says .
David Gergen : President Obama 's action on immigration is a troubling move . Gergen says Obama 's action is of questionable legality and sets a bad precedent . Americans want the parties to work together and want Congress to set agenda , he says .