During the same visit, Hunt wanted to make sure that when Trump met Vladimir Putin, he took a hard line with the Russian president - particularly in the wake of the Salisbury poisonings just a few months earlier.
John Bolton, Trump's national security adviser, told us: "My opposite number said: 'This was a chemical weapons attack on a nuclear power', to emphasise how significant it was. And Trump looked at Theresa May and said: 'Oh is Britain a nuclear power?' And I will say that the British stiff upper lips held but their eyes were wide as saucers."