Deal making is how the constitution came about. There is a difference with backroom brokering and deal making. You want an ideologically pure system that avoids deal making then scrap the constitution first.
Trump and his deals have nothing to do with the Constitution. Cruz is the most consistently constitutionalist candidate in the field.
Donald’s disregard for the Constitution almost matches 0bama’s. Proof of that is that while The Don says he’ll scarp all of 0bama’s executive orders (another promise he stole from Cruz), he then says “I’ll do good ones.” IOW, he’ll continue and extend the government by pen and phone that we all oppose, which shows he doesn’t understand the constitutional structure.
Trump would be a great deal more palatable if he mentioned the Constitution occasionally, talked about property rights and individual liberty. For added confidence, he could mention Locke, Montesquieu... but, thinking that too much to hope for, does not even reference Jefferson, Madison, Adams.
Where is that logic when it comes to other (actual) Republican candidates?