Repeat after me: "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." Ha! I tricked you. I have deceived you into swearing an oath, or affirming if your religious convictions do not permit swearing oaths. Of course the intention and effect are the same in either case. You will now be loyal and obedient, especially obedient.
Does it seem underhanded that someone should spring such an oath on you unexpectedly? That's how it's done in the military. You don't get time to think it over. You say I do with everyone else in the room. But you can relax now, you will never be tested on its meaning, because it has no meaning. It is designed solely to obtain your loyal, unquestioning obedience, just like you have been learning since before you could walk.
Given time to think about it no reasonable person would swear such an oath. Only someone desperate for a job that required it, or someone who routinely swears to things that are not true, make no sense, do not matter, or all these - like politicians. What say we take a closer look?
"I will support and defend the Constitution of the United States