I might be wrong on this (maybe) but because politics is downstream of culture (as Brietbart said) I think there were a couple of things that might have contributed to what went on at the polls.
I’m thinking of the piece done on “The Magdalene Laundries” by 60 Minutes,
https://www.cbsnews.com/news/magdalen-laundries-women-confined-in-convents/
and also the 2013 movie “Philomena” produced by Harvey Weinstein.
https://www.imdb.com/title/tt2431286/
both of which sought to drive home what a horrible, dreadful thing it was for a woman to have to bring her baby to term and give it up.
I have many friends who believe that completely and act on it. They will never vote for a pro-abort candidate, even if he or she is much better than the other candidate in every possible way.