This is what's going to happen. The government won't make it mandatory -- it doesn't need to. All it needs is for businesses to refuse to serve anyone who can't show their "papers." This is the very definition of fascism, as if we needed any more proof that fascism has come to America. When businesses and government cooporate to deprive the people of their rights. Another sure sign is liberal fascist goon squads roaming the streets, looking for people to beat up who wear red caps. That's already here.