Simple solution then, dont pass any amnesty bill.
Correct me if I am wrong, but didnt escaping slaves travel North BEFORE the civil war?
Blacks were not lining up to make it to the South to be put in chains to get free stuff like illegals are doing to get here.
Point made.
Africans did not book passage on ships to come to the colonies and become slaves. They were granted citizen status specifically because they were forced here against their will.