Obama's oath

Each president recites the following oath, in accordance with Article II, Section I of the U.S. Constitution:

"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."
http://www.swamppolitics.com/news/politics/blog/2009/01/obamas_oath_faithfully_misspok.html


If you pay attention to the video, you'll notice that the adverb "faithfully" was mispoken.