Not every elected Republican is anti-abortion, and not every elected Democrat is pro-choice. In fact, recently more Democrats were elected with anti-abortion or moderate views on the subject, and the party generally has returning to "big-tent" on the subject. Also, I bet you that most pro-choice Democrats and Republicans in office will wipe their brows in relief that the SCOTUS lifted that off their necks. Now they can say they would appoint pro-choice SCOTUS candidates but to the extreme pro-choicers they can say that this issue was already resolved by the court and was only a particularity of great controversy and not the main point of debate.

This particular practice was an albatross that anti-abortion candidates used to hang on pro-choice candidates that many did not want. Pro-choice candidates are often stuck between a rock and a hard place trying to fend off anti-abortion opponents whilst getting pro-choice support that often comes from groups, like NARAL Pro-Choice America, that seem to go too far in the other direction as to what they think ought to be legal. IMO, a noticeable minority of the nation opposes abortion except for certain limited circumstances such as threatening the life of the mother. From there they get more pro-choice but only to certain limits. Some would oppose it except for threatening the life of the mother, but also allow it for rape or incest. Early detection of fetal deformity and other complications get mixed opinions. Others are pro-choice only in the first trimester of pregnancy. Few, IMO, go so far as late term abortions unless the mother's life is threatened. And insofar as this procedure, it almost makes no sense why the foetus just couldn't be removed by ceasarian section or induced birth, and it smacks of infanticide couched in cynical and cruel technicalities of when a person is deemed
'born' in order to get away with it legally. Most, IMO, won't oppose its illegality.