The Butchering of the Oath

Here's the transcript of what actually went down yesterday afternoon:
Roberts: Are you prepared to take the oath, senator?
Obama: I am
Roberts: I Barack Hussein Obama
Obama: I Barack
Roberts: do Solemnly swear
Obama: I Barack Hussein Obama do solemnly swear
Roberts: That I will execute the office of President to the United States faithfully
Obama: that I will execute
Roberts: the off...faithfully the Pres the office of President of the United States
Obama: the office of President of the United States faithfully
Roberts: and will to the best of my ability
Obama: and will to the best of my ability
Roberts: preserve, protect, and defend the constitution of the United States
Obama: preserve, protect, and defend the constitution of the United States
Roberts: So help you G-d
Obama: So help me G-d
Roberts: Congratulations, Mr. President

The oath, as required by Article 2, Section 1 in the United States Constitution reads as follows: "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."