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Article VI of The United States Constitution states that the "Constitution, and the Laws of the United States which shall be made in Pursuance thereof; and all treaties made or shall be made, under the Authority of the United States, shall be the Supreme Law of the Land." This is commonly referred to as the Supremacy ...

Article IV: the constitution. To determine if it could be a law they must see if it’s constitutional or not. If seen not, then no law would be in place.