Doing these blanket bans unfortunately isn't working and does cause voter backlash. People have been conditioned for over 50 years and if you start talking about no exceptions for rape or incest then they're going to balk. It's bad strategy.
all i know is my daughters age group ( 40’s) who are actually mostly conservative in their view ( and all married women, btw) get their hackles up when they hear no exceptions. They will not vote R.
This decision should be between the parents and their doctor.