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In January 2010, the Arizona Senate approved a bill to strengthen immigration enforcement laws by making it a crime to be in Arizona illegally or to transport or conceal an undocumented immigrant. It also seeks to curb day-labor employment by making it a crime for an undocumented immigrant to solicit work in a public place or for anyone to hire someone from a vehicle. There are a number of federal laws that also prohibit hiring undocumented workers. What arguments are legally valid in favor of the federal law preempting state law?a. The federal law always preempts state law.b. The state law always preempts federal law.c. The issue is more easily regulated by one central government body.d. This would violate separation of powers.e. There is no federal legislative history about the issue.

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