Earlier quoted context omitted.
Sure ask for ID. But a lot less could go wrong than just letting anyone into the country en mass with no practical way to remove them. You effectively don't have a country at all under that regime.
> Sure ask for ID Let's just turn to our national ID system...oh wait... > But a lot less could go wrong than just letting anyone into the country en mass with no practical way to remove them. Are you suggesting the only two options are extraordinary rendition to concentration camps in El Salvador with no recourse or instant squatters rights for all foreigners? > You effectively don't have a country at all under that…
We do have birth certificates and in most states it is actually very hard to get state ID without at least residency so yes asking for ID is usually enough.