Whew! Guess I can stop worrying about that, then!
Your assurance that the matter would be ‘dealt with’ notwithstanding, how does this answer the OP?
No soldier has the authority to relieve the president, or any other civilian official of his command.
A soldier can say “That order is an illegal order and I refuse to obey it” and report the order to the appropriate authorities…in this case the cabinet and congress. But he doesn’t have the legal authority to relieve the president of his post as commander in chief.
Of course, if the solider thinks that if he doesn’t arrest the president then the president will pretty soon find someone willing to carry out the order to nuke Canada, then he can go ahead and “arrest” him. It wouldn’t be legal, it wouldn’t be constitutional, but some times you have realize that some things are more important than the consitution–you know, like not incinerating millions of people in a nuclear conflagration. Afterward the soldier that extraconsitutionally kidnapped the president would have to justify his actions at a court martial, and probably would be discharged from duty and thanked.
I’m not saying you are incorrect, but Executive Order 13394, which replaces earlier EOs, says the following:
Section 2 then goes on to state the order of precedence, starting at DepSecDef and going down, and Section 3 basically says that no acting DepSecDef (or whatever position) may become acting Secretary, and the President can always choose someone else to do the job anyway.
Only knowing what I read in this executive order, I don’t see how someone who is acting Secretary doesn’t have the functions and duties of the Secretary. I don’t see anything in the Vacancies Act (as amended over the years) that would distinguish the powers of a lawfully acting secretary of any department from the powers of an appointed secretary. Do you have a cite for your claim that an acting Secretary of Defense wouldn’t serve in the same capacity in the NCA as a regularly appointed Secretary?
I’m sorry, my post wasn’t clear. The “first person involved” wouldn’t be an individul soldier, but the SecofD. He would order all of the soldiers around him to arrest the President, relieve him of command under the temp provisions of the 25th amendment, and under the circumstances (the P orders the nuking of London because the Martians are there) they would comply.
The SecofD, as a cabinet member would immediately start 25th amendment proceedings against the President.
Regarding the Saturday Night Massacre scenario: do you need an actual, memorized code, etc. (I seem to remember something about this in the Sum of All Fears) to “press the button?” If so, how many people have such a code (i.e., how many people would you have to fire before you ran out of people that could quickly “push the button”), and how long would it take to give a new SecDef his or her codes? Minutes? Hours? A month?