Oath of office of the President of the United States The oath of
office of the President of the United States is an oath or
affirmation required by the United States Constitution before
the President begins the execution of the office. The wording is
specified in Article Two, Section One, Clause Eight: 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 States.”
Administrator of the oath  While the Constitution does not
mandate that anyone in particular should administer the oath,
the oath is typically administered by the Chief Justice, but
sometimes by another federal or state judge (George Washington
was first sworn in by Robert Livingston, the chancellor of the
State of New York in 1789, while Calvin Coolidge was first sworn
in by his father, a Justice of the