Breitbart.tv includes here a transcript of those last 30 seconds--Obama, before entering the Senate, discussing the possibility of running for president:
I am a believer in knowing what you’re doing when you apply for a job. And I think that if I were to seriously consider running on a national ticket, I would essentially have to start now, before having served a day in the Senate. Now there are some people who might be comfortable doing that, but I am not one of those people.
One possible tagline: "Don't take our word for it. Take his."
(...or should that be His?)