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the Supremacy Clause

Compare the second clause of Article VI of the Constitution (the Supremacy Clause) with the 10th Amendment. Are all laws passed by the national government supreme over state law? If not, which ones are supreme and how can they be distinguished from those which are not?

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Kendall T. | Helping Students Succeed With Individual AttentionHelping Students Succeed With Individual...
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The Supremacy Clause provides for the Constitution and the Laws created by the United States to be the “Law of the Land”, which means that the federal government holds power over any laws created at the state level. The tenth Amendment is meant for states to create laws that are not currently reserved by the federal government.
This means that states can make their own laws that the Federal Government currently does not have the power to enforce. Whenever a state proposes a law that conflicts with a federal law, the federal government will always win. For example, if a state wanted to reintroduce slavery, the Supremacy Clause and the 13th Amendment would supersede the state’s request. A state however, can make their own traffic, and criminals law, etc.
The Federal government is responsible for making laws regarding the military, money, taxes, international relations, etc. The states are responsible for state level taxes, transportation, capital punishment, family law, etc.

Dannie B. | English, Test Prep, and Music for High School StudentsEnglish, Test Prep, and Music for High S...

States cannot pass laws that violate the Constitution or the Bill of Rights or any national laws. But - if a power is not explicitly given to the national government, then the state has autonomy over that power. The 10th amendment guarantees that. So if a power is not covered under a constitutional basis, the state has the right to that power. However, states do not have the right to determine what laws are or are not covered under a constitutional basis. That power is left to the federal government.