His ad, which Kathryn has embedded below, says it is a “despicable lie” to answer yes. I wouldn’t say that he supports infanticide; but I would say that in certain cases, he is pro-choice on infanticide.

UPDATE: Actually, listening to it again, the ad says it’s a “despicable lie” to say that Obama favored “letting infants die.” But he does favor letting some infants be killed. The ad is, as Kathryn said, dishonest.