Browse the Constitution Annotated

Article II 

    Section 1

    • Clause 8
    • Before he enter on the Execution of his Office, he shall take the following Oath or Affirmation:– I do solemly swear (or affirm) that I will faithfully execute the Office of President of the United States, and will to the best of my Ability, preserve, protect and defend the Constitution of the United States.