David Gregory coaxes out of Marco Rubio his most definitive denial yet.
GREGORY: If your party comes to you and says "Look, you can focus on Florida, but in the fall of next year, we really need you on the ticket if we're going to carry Florida."
Are you saying there's no way you'll consider it or do it?
RUBIO: I won't consider it. I don't want to be the vice-president of the United States. I want to be a Senator.
GREGORY: So, under no circumstances, would you serve on a ticket in 2012.
RUBIO: No, I'm not going to be on a ticket in 2012.
GREGORY: Under no circumstances?
RUBIO: Under no circumstances.