On a visit to Texas on Friday, US President Donald Trump gave a raucous speech on the economy and then stopped off at a fast-food joint. “Hamburgers for everyone!” Trump declared to cheering customers at the Whataburger restaurant in Corpus Christi, before the 47th president left clutching a bag with order No 47. Nine hours later, in the dead of night, Trump announced from his Mar-a-Lago resort in Florida that he had ordered the start of a major attack against Iran. It was the culmination of a.....