CNN - Who came across as the stronger leader?
Obama - 51%
Romney - 46%
CNN - Who came across as more likeable?
Obama - 48%
Romney - 47%
CNN - Who spent more time attacking their opponent?
Obama - 68%
Romney - 21%
Oversamples Republicans.
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They keep saying the debate won't change the election.

Clearly the majority of people are decided. They already know who they are going to vote for regardless of who wins debates. However, that ends up being roughly 50/50. It's the undecided voters who are going to decide the election. And the undecided voters ARE looking to these debates to decide their candidates.