Answer:
"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."
Step-by-step explanation:
The official reciting the oath swears an allegiance to uphold the Constitution. The Constitution only specifies an oath of office for the President; however, Article VI of the Constitution states that other officials, including members of Congress, "shall be bound by Oath or Affirmation to support this constitution."