So who botched the oath?
According to the Constitution, incoming presidents are to recite the following at their swearing-in:
“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.”
When Justice Roberts issued this oath to Obama, he moved “faithfully” to the end of “President of the United States.” Obama started, then paused until Roberts began to repeat the line again. Obama then began to restate the line, and in an apparent concession to Roberts, tacked “faithfully” to the end.
So it appears as though Roberts incorrectly presented the oath to Obama. Still, a teleprompter could have solved this problem, just as it has solved so many of Obama’s other problems.