HERMAN CAIN: Happiest I've ever been, the list is too long to say the happiest. Remember, I'm a generally a very upbeat, happy person. So it's very difficult to pick one of the happiest days of my life. If I had to pick one that was one of the happiest days of my life, I would have to say when I became an associate minister at my church, Antioch Baptist Church North.
JONATHAN KARL: All right, all right good. Name the fifth president that belongs on Mt. Rushmore.
HERMAN CAIN: The fifth president that belongs on Mt. Rushmore, he hasn't been president yet.
JONATHAN KARL: (LAUGH) Okay, all right, (LAUGH) we'll go with that.
HERMAN CAIN: No, the one possibility up until this point would be Ronald Reagan.
JONATHAN KARL: Ronald Reagan--
HERMAN CAIN: Ronald Reagan.
JONATHAN KARL: Okay, okay. Now, who would play Herman Cain in the movie? This is gonna be one hell of a movie.
HERMAN CAIN: He hasn't been discovered yet.
JONATHAN KARL: Okay, last (LAUGH) question. Tell us in Tweet length, and this is 140 characters or less, why do you want to be president?
HERMAN CAIN: I want to be president because I believe this nation is on the wrong track. And I believe that I have the experiences, the leadership capability-- to be able to get us back on the right track, consistent with the founders' intentions, the Declaration of Independence, consistent with the Constitution, and consistent with free market principle. That's why I want to be president.
JONATHAN KARL: Think you might've used a few more than 140 characters, (LAUGH) but-- close enough. Herman Cain, thank you for joining us here on this-- special-- event for ABC News and Yahoo News, thank you. And if you've missed any of this live stream, it will be available both on ABCNews.com and on Yahoo News. Thank you very much for watching. Mr. Cain, thank you.
HERMAN CAIN: Thank you.