I really wish that question would stop being asked. Please explain why you ask?
But, I will again give my answer.
Trump will have my vote in that scenario, when he convinces me that he will lead in accordance with the enumerated powers and, among other things, the Tenth Amendment.
The latter, of course, would require him to walk back his support of Obergfell. (Remember that?)
The only think I ever heard him say was that the “Supreme Court has decided”. Is that what you refer to as support?
Honestly, I see no difference with Cruz’s response: “It’s a question for the states.”
Both are saying, “Not in my in-box at this moment in time.”
Neither want to make opposition a key issue at this point in their campaigns, and neither give any indication if they’ll fight and how they’ll fight.