Ron Paul believes the constitution dictates abortion is a State issue, not a Federal one.  While he did vote for a partial-birth ban, he did so objecting very strongly to the assertation it was a federal issue.  In this day and age I am suprised the pro-choice movement wouldn't prefer this to be handled on the state issue.  If the government makes this a federal issue abortion could be banned nation-wide as opposed to having to ban it in 50 states.