Obama Has a Nice Moment, Too

Speaking of nice moments, Obama showed his ease in the debate a few minutes ago. After Sen. Joe Biden (Del.) said that both he and Obama had been tested for AIDS, Obama jumped in to note that he had been tested with his wife, Michelle -- jokingly adding that he didn't want anyone to think anything "funny" was going on. The crowd laughed as PBS showed Michelle on screen. The moment showed how Obama has grown in the first three debates; he appears relaxed and comfortable tonight.

-- Chris Cillizza