Could anyone stop a US president from launching nuclear weapons?
‘He doesn’t have to check with anybody. He doesn’t have to call the Congress. He doesn’t have to check with the courts.’

If Donald Trump – or any US president – ordered a pre-emptive nuclear strike, could anyone stop him?
The answer is no.
Not the Congress. Not his secretary of defence. And by design, not the military officers who would be duty-bound to execute the order.
As Bruce Blair, a former nuclear missile launch officer and expert on nuclear command and control, has put it: “The protocol for ordering the use of nuclear weapons endows every president with civilisation-ending power.”
Trump, he said, “has unchecked authority to order a preventive nuclear strike against any nation he wants with a single verbal direction to the Pentagon war room”.