I'm pretty sure that I wasn't planned.
My mom was told that she wouldn't be able to have children but that doesn't mean that unplanned children aren't loved just because their parents are pro-life or pro-choice (If my parents really didn't want me, they could of gave me up for adoption. Pro-life doesn't mean you have to keep the child).

Political stance has nothing to do with weither or not the unplanned child is unloved, it really depends on the kind of people the parents are.
Some pro-choicers love their kids and some pro-lifers don't.