According to a report on Jezebel.com George W. Bush cites his mother's miscarraige as the reason he became pro-life. Apparently, Babs thought it was a good idea to show teenage Dubya the jarred remains of what would have been his younger sibling. He says it taught him that we should respect life.
I am not sure how well my face of belief translates in text, but it looks something like this...