I don't get what you're after. If the people wanted it and the legislature wanted it, he can still be against it, but what then? He can oppose it, but what do you expect him to do about it, if the voters actually want it?
“but what do you expect him to do about it, if the voters actually want it?” ———
That is a great question. I just heard that Carly Fiorina said that, in the case of the SCOTUS ruling favorably for gay rights, that she would have to support that ruling.
I would rather hear these candidates say that while they can not make law as the SCOTUS is attempting to do, they would nevertheless protect religious liberty and give exemptions to Christian churches who are under siege and Christian businesses and organizations affiliated with the Church, such as the Little Sisters of the Poor finally received.
Retaining religious liberty covers a multitude of cram down intrusions against Christians.