Art II, Section 1:
Before he enter on the Execution of his Office, he shall take the
following Oath or Affirmation:
"I do solemnly 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
The Senators and Representatives before mentioned, and the Members of
the several State Legislatures, and all executive and judicial
Officers, both of the United States and of the several States, shall be
bound by Oath or Affirmation, to support this Constitution; but no
religious Test shall ever be required as a Qualification to any Office
or public Trust under the United States.
Congress shall make no law respecting an establishment of religion, or
prohibiting the free exercise thereof; or abridging the freedom of
speech, or of the press; or the right of the people peaceably to
assemble, and to petition the Government for a redress of grievances.