The United States is rightly worried that a strange and callow leader controls North Korea’s nuclear arsenal. North Korea should reciprocate this worry. Yes, a 70-year-old can be callow if he speaks as sophomorically as Trump did when explaining his solution to Middle Eastern terrorism: “I would bomb the s— out of them. . . . I’d blow up the pipes, I’d blow up the refineries, I’d blow up every single inch, there would be nothing left.”

As a candidate, Trump did not know what the nuclear triad is. Asked about it, he said: “We have to be extremely vigilant and extremely careful when it comes to nuclear. Nuclear changes the whole ballgame.” Invited to elaborate, he said: “I think — I think, for me, nuclear is just the power, the devastation is very important to me.” Someone Trump deemed fit to be a spokesman for him appeared…