I'm having trouble understanding what "two provisions of the U.S. Constitution" are violated in the process of asking for proof of citizenship. There are four clauses in the Constitution regarding voting--found in Amendments 15, 19, 24, and 26. Every one of them begins with "citizens." The Constitution assumes that only citizens may vote. Logic and common sense are on the side of laws that require proof. How else does one know that a voter is a citizen??