Not much and for good reason; they don’t know that much about it.
They would not know if what they want to do or how they wanted to go about doing it is constitutional or not, later in the debates when issues are discussed rather the personality debates we have this early, Cruz will be able to school the candidates and the electorate on what idea’s are constitutional, the majority of candidates will shrivel as their ignorance is exposed, for now he keeps his powder dry.
If they’re that ignorant now...then I’m assuming they don’t care about the Constitution.
I’m hoping Trump will hand it off to Ted. Praying he will hand it off to Ted.