How exactly would it work? The police detain someone who they suspect might be an illegal immigrant until a friend or relative brings in their birth certificate or passport? Seems like a colossal waste of manpower and money that could be spent on trying to keep illegal immigrants out in the first place.

And consider this: driving home from the range, the police detain you until they can run a background check to determine if you're legally allowed to own firearms.

I know one illegal immigrant (I know, for a liberal that's a piss-poor number); my cousin who lives in Florida. She is white and speaks with a horrendous American accent, so her chances of being stopped on suspicion of being an illegal immigrant are slim to none.