Grover vs. the Constitution
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are dependent upon what established authority the party taking such oath demands. Anyone and I mean anyone who takes a job that is on the federal or state payroll in this country takes an oath of loyalty to that official entity, in the case of members of Congress it is the oath displayed in the OP. I have taken that oath myself as does anyone working in a National Park or any other position paid by the treasury. States have similar oaths for their employees and elected officials to confirm that they understand their role and the set standard of loyalty the state requires as representatives of their constituents when making laws and agreeing to administer them and but I am willing to bet they are also required to take the Constitutional oath displayed above. Attorneys take the same oath when admitted to the bar as they are in the profession to advise citizens and non-citizens of the laws, that must be in harmony with the Constitution in this country, when they are faced with legal issues that need someone with explicit knowledge of the laws to assist them in navigating the legal system.
Professional oaths, such as the Hippocratic Oath that doctors take, assure loyalty to the philosophy that embraces the maxim of "do no harm" and is required by the member of the profession such that a unity in loyalty to a moral standard is adhered to.
So, members of any of the groups you mentioned, would be held to the same oath with the one exception of doctors and if they work for the US government in any capacity, they will be taking that same oath.
Grover Norquist, on the other hand, is a political hack, and a piss poor one at that, who has actually participated in treasonous acts and continues to by coercion in that he insists that these members of Congress pledge allegiance to his philosophy/edict that is not guided by Constitutional morality nor is he (or his overlords) interested in whether his pledge meets Constitutional muster. Actually, it's all about usurping the Constitutional oath that these members of Congress are required to observe regardless of any other interest. With regard to taxes, they actually did break their Constitutional oath by signing GN's pledge. What his oath is designed to do is to ensure that the barons of wealth are given legal cover to act in unconstitutional practices that are harmful to the nation as a whole by requiring signers of his pledge to defer their fiduciary responsibility to him, his will and not that of the people who elected them in good faith.
And that is enough to call it treasonous and a host of other terms that should land him in the hot seat with the Justice Dept.. Maybe we'll be lucky and this POS won't be able to slime his way out of trouble this time. He was not convicted when he was found to aid and abet Jack Abramoff, he was a big time lobbyist for the big tobacco corps when they were found to be illegally addicting millions of people... and there's much more but I digress at that point. Suffice it to say, the OP is correct and that should be enough. GN should be stripped of his citizenship and imprisoned for a long time or banished from seeing land again in his lifetime as their is probably no place on this planet for a POS like him. (On a float in the ocean, or maybe the garbage island out in the south Pacific would be suitable in my view.)
Welcome to DU. 
Apart from some typos (it was just before I went to bed) it is the reality. I attribute the lack of knowledge some possess to the fact that civics is no longer part of curricula in our education system, a travesty in my reckoning... and I find it highly annoying, sometimes beyond that.
Glad to be a participant in DU, been a lurker off an on for years.
