Though not specifically mentioned in this chapter, all disorders and neglects to the prejudice of good order and discipline in the armed forces, all conduct of a nature to bring discredit upon the armed forces, and crimes and offenses not capital, of which persons subject to this chapter may be guilty, shall be taken cognizance of by a general, special or summary court-martial, according to the nature and degree of the offense, and shall be punished at the discretion of that court.
You’re right about 134. A case can be made for 89, if “chain of command” can be interchanged for “commissioned officer”, since the POTUS is chain of command.
But, there’s always the possibility it was disobedience to a direct order, given that he was counseled on what he could and couldn’t do.
I agree about E-5 after 9 years. Something else is going on here that we’re not seeing.