Segnosaur
Penultimate Amazing
Could the military people (in theory) claim that they swore an oath to defend the US against "All enemies foreign and domestic", and a president who is launching a nuclear first strike for personal reasons is engaging in an activities that make them an enemy?None of whom have the authority to countermand it.While a President does have a "Big Red Button" of sorts, it still has to go through a few layers before a launch is performed. The high-ranking military person in charge could put a halt to it. (This is much simplified.)
Or, if they cannot countermand the order, could they at least slow-walk it, hopefully giving a chance for saner heads to prevail and remove him from office via the impeachment or the 25th amendment?
"The president has just ordered us to drop nuclear bombs on Canada and the EU because the Canadian PM hurt his feelings. We will get right on that... in 2 weeks."