Choose something

So as I was driving home today, the car in front of me had an oval sticker on it’s rear window that said “Jeb!”. I’m pretty sure this is a show of support for Jeb Bush, the republican governor here in Florida. At least I think he’s the governor. He’s involved in Florida politics anyway.
Now here’s the part I’m curious about. This car also had a “Choose Life” license plate. Where did the association between conservative politics and anti-abortion come from? Anyone know?