The audience is hand picked, most likely from Obama staffers. They'll be presented as “simple, honest folk.” Many will claim to be “life long Republicans” and will state that they are voting Democrat for the first time.
That's why debates managed by the main stream media are a lot like clinical psycodramas.
I know. I was kidding. I just had this funny vision of the two of them standing before an audience full of greenery. And that CNN newshag who looks like she should have a feedbag tied around her neck.