This was in an email sent to Jonah Goldberg at the National Review:

But, Americans don’t like to lose. It would have been bad enough for the US to lose out to Rio, but, Obama raised the stakes by putting his (and therefore the country’s) prestige on the line. I think this sense of Obama = loser is going to stick in people’s minds for a long time.

via Olympian Politics – Jonah Goldberg – The Corner on National Review Online.

Of course, maybe this has more to do with his off-handed comment about the Special Olympics last spring.  Here is my post from March (the Special Olympics comment is toward the end).  Here is a related post from the Huffington Post.  If you look at the results from the poll taken at the bottom of the page it would seem to indicate a lot about the regular viewers at the Huffington Post (the poll itself is interestingly worded).