You conservatives and Libertarians need to look up what the constitution says:
You and your ilk politiians are just wasting time trying to make a point:
Federal preemption - Wikipedia, the free encyclopedia
According to the Supremacy Clause (Article VI, clause 2) of the United States Constitution,
This Constitution, and the laws of the United States which shall be made in pursuance thereof; and all treaties made, or which shall be made, under the authority of the United States, shall be the supreme law of the land; and the judges in every state shall be bound thereby, anything in the Constitution or laws of any State to the contrary notwithstanding.