If you watch the video, you will see Obama stroke his forehead and hide his eyes when he utters the famous words.GMTA!His body language betrays that he knows he is doing something shameful.
See similar words from here: http://tammybruce.com/2008/09/obama_panics_hits_bottom_of_ba.php:
...Outrageous. Actually, without devolving into too much body language issues here, even Obama is uncomfortable with what he's about to do.Notice he puts his hand up to ostensibly scratch his face, but is actually covering it.
And remember also, we've learned he uses teleprompters at these events, so that slur was not off-the-cuff, it was written and planned and he delivered it, consciously... - Tammy Bruce
That’s a nice mind to be compared to. Tammy Bruce is a very clear thinker.