For someone who spends so much time talking about the threat from North Korea perhaps Donald Trump should try working more closely with the country directly in the line of fire of the dictator in Pyongyang. During his 11-day tour of Asia, the US president is spending more time in every other country he visits than he is in South Korea, a staunch American ally and ground zero in any future confrontation with Kim Jong Un.

The recently elected government in Seoul has rolled out the red carpet and attempted to charm Mr Trump, despite his insulting remarks about President Moon Jae-in, whom he called an appeaser of North Korea in a tweet.

Before this visit, Mr Trump also threatened to tear up a free-trade agreement with Korea and suggested South Korea should pay more for the defence umbrella provided by the US.