NObama had to answer with a non-answer. If he answers 'at conception' he loses the pro-choice support. If he says 'at birth' he has to face his record.
Since he basically said..."I don't know' shows he has little in the way of convictions, and will sway which ever way the wind blows.
The Dhims really want him as leader of the Free World?
It has never been a "Free World" that they want him to lead.