The issue would pass to the realm of state's rights.
That is what many of us have said from the start. As Rush has said often, there is no controversy about abortion in Britain because it was ok'd by the voters. SCOTUS has repeated its blunder by legalizing same sex marriage. A small group endeavors to impose its moral views on the nation by fiat.
It will never work. AND the ultimate target is Christianity. Such heavy-handed dictates will never be imposed on Muslims.