The U.S. Constitution declares that federal law is “the supreme law of the land.” As a result, when a federal law conflicts with a state or local law, the federal law will supersede the other law or laws. This is commonly known as “preemption.” In practice, it is usually not as simple as this.…

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The Commerce Clause of the U.S. Constitution grants broad authority to Congress “to regulate Commerce...among the several States.” In connection with Congress’ Commerce Clause powers, courts have inferred that state governments do not have the power to regulate commerce in other states. The Dormant…

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