Ted Cruz has voiced solid support, and he has been the most vocal on following the Constitution of any candidate.
Jindal has voiced some limited approval, especially WRT a balanced budget, term limits.
Rand Paul, similar to Jindal.
Huckabee and Kasich seem favorable to it...
I think that the remainder have steered clear of the issue completely. While that is not strictly definitive, it still speaks volumes of their position during a period of time when they need to get their positions and “non-positions” known.
I still hope and believe Ted Cruz will be our modern day Patrick Henry and spark revolutionary reforms.