That was Roberts' fault, not Obama's. - Joshua Rosenstock

Does it really matter? - Roberto Bonini

No, it doesn't matter, the oath itself is a technicality which would not prevent Obama from assuming the full powers of the presidency. You can even see Obama smiling because he knew Roberts flipped the words and waited a second for Roberts to recite it properly, but Roberts butchered it even worse the second time. Roberts admitted it was his fault during lunch that day and they reenacted it last night at the White House as a legal precaution. You can guarantee Roberts will say it perfectly from now on. - Joshua Rosenstock