The next debate is crucial for both candidates. Romney needs a great showing to continue his 'comeback' of sorts, and Obama needs a great performance to stop the bleeding. In fact, the election might be decided after this next one. If Obama does well, I think he has this in the bag. If he struggles again, Romney could start running away with things.
The third debate is usually the least watched, so I expect it will have a minimal impact regardless of how it goes.
Agreed. The second debate will be an opportunity for Romney to move closer towards sealing the deal, and for Obama as a chance to regain his footing. I think an easier task for Romney than Obama.