"I, _____, do solemnly swear (or affirm) that I will support and defend the Constitution of the United States against all enemies, foreign and domestic; that I will bear true faith and allegiance to the same; and that I will obey the orders of the President of the United States and the orders of the officers appointed over me, according to regulations and the Uniform Code of Military Justice. So help me God." (Title 10, US Code; Act of 5 May 1960 replacing the wording first adopted in 1789, with amendment effective 5 October 1962).
The oath obama took when he was sworn in twice was similar and specifically mentions preserving, protecting and defending the Constitution. We've all seen how well he is living up to that oath.
And weren't the DUmmies calling for the Military to blatantly disregard orders from GW Bush when he was President saying they were under on moral obligation to obey his orders regarding the Iraq war?