Yes, in the absense of "Honest Rape" panels, abortion on demand is fine anyone willing to tell an MD or nurse she was raped. For somewhere between one day and seven months. Whether a majority of voters would agree would depend on where you put that outlying date, if first trimester or viability, you're probably right. And that's who Paul is appealing to, in a way that he or his supporters can describe him as pro-life. As always he's on both sides of the issue.
When I’m arguing with a pro-abort, I choose the opposite tactic -
for every fringe case they bring up, I’ll rhetorically “allow” that exception,
leaving my “opponent” arguing for abortion on demand for convenience, and then I’ll make them defend that position.
If they’re the typical sheeperal who wants to think of themselves as a good person, instead of a radical feminist with a seared conscience, they are ashamed (but don’t change their mind - I’m just planting seeds).