Looking at what the SB 1070 lawsuit is founded on

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The foundation for the government's case is the so-called supremacy clause of the U.S. Constitution. But what is the supremacy clause and how does it apply to SB 1070?

Frank Camacho sat down with a former U.S. Attorney for some answers.

For several years, Paul Charelton served as U.S. Attorney for Arizona during the George W. Bush administration. He is well versed in constitutional law and provides this explanation of the supremacy clause.