WASHINGTON, DC - JANUARY 21: U.S. President Barack Obama waves to spectators after his speech at the ceremonial swearing-in at the U.S. Capitol during the 57th Presidential Inauguration on the West Front of the U.S. Capitol January 21, 2013 in Washington, DC.   Barack Obama was sworn in for a second term as President of the United States.  (Photo by Scott Andrews-Pool/Getty Images)
The Oath: 35 words that make a President
11:12 - Source: CNN

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