States should decide the issue of slavery
Although Portugal was the first to use African slaves, Spain first sent them to America
Crops, Farmers, Livestock or are you talking about modern day?
The answer is ethnocentrism.
No, no U.S. state has this prerogative. The rules for acquisition of United States citizenship are set out in the Immigration and Nationality Act of 1952, which is a uniform legislation as required by the constitution, which determines in its Article I, section 8, clause 4 that Congress shall have power "To establish a uniform Rule of Naturalization."
