You have to remember that the libs are convinced that their political philosophy of governance is correct..that's why they won in 2008, of course. Therefore, the ONLY reason the can lose in 2012 is if Obama does a lousy job as a candidate...IOW, it's NOT the message, therefore, it's gotta be the messenger.
Romney will back off, and try to look firmly presidential. Less aggressive. He'll get as many touchy feely questions as they can throw at the uncaring creepy Republican.
For Obie's part, the format won't allow him to be his best, which is 100% teleprompter. He has no best in this townhall debate, which I assume is a similar debate, but with questions from the audience. He'll be able to spew his platitude to the fawning questioner, but Mitt will bring him back to reality in short order.