So the oath was flubbed.  That’s bad.

Best joke :   “How many former editors of the Harvard Law Review does it take to administer the Presidential oath properly?”   “More than two.”

Best solution :  Just do it again at a press conference, “because you know the deranged Obama haters are going to go crazy insisting he’s not really the president.”

Historical significance:  None.  We have far more consequential matters before us, and this piddling one is nothing more than a curiosity and at absolute most, an historical footnote.  Everyone has had their fun, but we now have a nation with problems to address.  Move on.

Update:  Aside from the Prez taking my advice (well done there, Sir), Marc Randazza chimes in with yet another claim of error:

The words “so help you God,” are not in the Oath. However, since Chester A. Arthur, most (if not all) Presidents-elect have thrown in this little garnish. I previously opined that Mr. Obama could, if he wanted to, throw in a little extra props to his personal deity. In fact, if Obama wanted to end the oath with “The Snozzberries taste like Snozzberries,” he would have had every right to do so.

On the other hand, upon the completion of the Oath as it appears in Article II, Section I, Roberts next line should have been to either shut up or say “congratulations, Mr. President,” — not to ask Obama, “so help you God?”

Snozzberries?  No, I don’t think that would have been right.  Not at all.