Could Trump push the red button before he leaves office?

Never more than a few feet away from him, the president has the means to launch a nuclear attack. And the temptation in the next few weeks will be greater than ever, says Chris Horrie

Donald Trump with Mike Pence, Robert O’Brien, Mark Esper, who was fired this week, and Mark Milley (Getty)

Donald Trump’s decision to fire Defence Secretary Mark Esper on Tuesday removed one of the final barriers between the president and his ability to launch the US arsenal of nuclear missiles on his own authority without consultation and perhaps even without warning. The US president is required to consult with his defence secretary before making a decision to fire nuclear weapons. But if the defence secretary objects he can be over-ruled. The president retains ultimate and sole control because he can sack the defence secretary in the event of disagreement.

The only other person who could prevent the president from ordering a nuclear attack would be Vice President Mike Pence, through the indirect means of declaring Trump to be insane and removing him from office. Section four of the 25th amendment to the US constitution would allow Pence to do this, but he would require the unanimous support of the cabinet. Nobody thinks that Pence would defy Trump in this way. And the Trump cabinet has an overwhelming majority of his supporters, apparently selected more for their personal loyalty to him than their expertise or backbone.

The departure of Esper, originally brought into the cabinet as yet another loyalist – he had previously worked as a lobbyist for arms manufacturers – and the relative lack of standing of his replacement, Christopher C Miller, means that the last hurdle between Trump and the doomsday command has been removed.