Here’s an interesting bit of survey analysis from Gallup. Americans’ views on abortion aren’t changing but are getting more sorted by party.
Here’s the overall picture:
But here’s a glimpse at the underlying changes:
There are presumably two reinforces dynamics at work here. One is that people with strong views on abortion are tended to align themselves with the right party. And the other is that people with shallow convictions on abortion are aligning their views to conform with their co-partisans and the politicians they like.