The foundational intent of the US Constitution is that of limited government, wherein the power of the government is limited by its separation into three branches and is shackled by the rights inherent in the people themselves. More importantly, these individual rights precede and supercede the government itself; they are granted by the Creator. Hence the most immediate point of the Constitution is that the government is granted its powers solely by the people, in whom all power of government lies.
To me, that is Consitutional principle to which all politicians should subscribe. Now, looking at the Constitutional foundation ideals - how many Republicans truly believe and practice it?
The founders themselves recognized the constitution as a "living document" that is the reason for the amendment process. They did NOT stamp FINAL DRAFT on the constitution they wrote and then ratified. You still cannot give me what is meant by "constitutional". You just throw it out like a "when did you stop beating your wife" challenge and the accuse others that disagree as being NOT “constitutionally” minded. It is specious and frankly unworthy of serious debate.