@JLeslie That’s a great point, the pope has much more time to school himself on a core topic like abortion and it wouldn’t surprise me if he knows quite a lot about it from all angles.
The president has a lot of topics he needs to know a lot about, he probably knows plenty about abortion, too, but is less likely to have made a study of the faith-based arguments against abortion rights.
So, as a lark, as an intellectual exercise, I have to bet on the pope to outclass the president when debating for the other side on the abortion issue.
And another good point, @JLeslie, that it’s not clear what Mr.Obama believes on the topic of abortion rights.
So, assuming that Obama is pro-abortion-rights, and that the pope is anti-abortion-rights, Papa Obama Vincit.