I am not optimistic because my conservative friends can only argue about their Biblical principles and NOT the case law...
I have been saying this for years about Reynolds v. United States.
I would have to look at that case. I don’t think marriage should only be argued on Biblical principle. I often argue as to why the State should give special status to the union of one man to one woman which is supposed to be for life and for the rearing of children. That this status came after the natural inclination to form such unions. That marriage is a natural right not a civil right and the place of government is to not create unions that define marriage but to protect marriage as it has been known throughout history and most cultures.