Von Spakovsky at National Review.

“As Judge Melgren said, the Supreme Court made clear in the Arizona decision that under the Constitution, ‘the states, not Congress, set the voter qualifications for federal elections.’ Congress can set the rules for voter registration, but it would raise ‘serious constitutional doubts’ if the NVR A were interpreted to prevent states such as Arizona and Kansas from obtaining information necessary to enforce its voter qualifications.”

Melgren’s opinion is important because it emphasizes the constitutional power of states to run their own elections – an axiom that many despise because it interferes with an agenda to centralize power.  Naturally, the reason the Constitutional axiom exists is to preserve liberty.  Decentralization of power promotes individual freedom.