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The Constitution officially became "the law of the land" on March 4, 1789, when it became operational.

The US Constitution was:

  • adopted on September 17, 1787
  • ratified June 21, 1788
  • became operational March 4, 1789.

Article VI, which contains the Supremacy Clause, established the Constitution (and Federal Laws and treaties established in accordance with constitutional principles) as the Supreme Law of the Land when the document legally replaced the Articles of Confederation on March 4, 1789.

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14y ago

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