Limbaugh Challenges Obama to a Debate

"You are one of the most gifted public speakers of our age. I would think, Mr. President, you would jump at this opportunity." -Rush

This debate will obviously not happen. The quote above would think to make sense, but if you think about it, Obama has zero incentive to accept this debate. What does Obama have to gain from it? If he wins, nothing happens. If he loses, he is humiliated.