Anybody who thinks the pro-life cause will be enhanced by helping radically pro-abortion Democrats win elections is delusional to the point where I question if they are pro-life at all.
Pro-lifers can continue to have political influence at all only if the GOP knows that it will lose elections if it betrays them. THAT is the cold, hard political reality. Anyone who says otherwise either doesn’t understand politics or doesn’t really care about the pro-life cause.