Trump's fiery rhetoric is unhelpful - it might stoke his base at home, but it also inflames his enemies
Is this the president you want in a crisis? That has been the question looming over Donald Trump ever since he first entered the US presidential race two years ago.
His rapid-fire tweets and impetuous comments have long suggested he might not offer the cool-headed analysis expected in America's commander-in-chief even as he sailed through his first six months without facing serious turbulence.
That changed on Tuesday, when the 'Washington Post' revealed analysis suggesting Pyongyang has produced a miniaturised nuclear warhead. Put that together with the ICBMs they have been testing in recent weeks and Kim Jong-un's regime is one step away from having the capability of launching nuclear strikes on the US mainland.