Over the last decade, being “pro-life” has got a lot more popular. To a lesser extent, pro-life political positions have also got more popular. An extremely comprehensive recent look at changing opinions in a swing state is here.
I’ve had a hard time finding data about LDS attitudes towards abortion, let alone about changes in those attitudes over time. This site claims that Mormons are the most hostile to abortion of any religious group, but the data appears to be from small samples two decades ago. We have some pretty smart, well-informed readers here, so maybe some of you can help me.