Trump on Tour

Trade diplomacy at Windsor Castle.Before Donald Trump’s state visit to the United Kingdom, there was no shortage of speculation that something might go wrong. Perhaps demonstrators would cause disruption. Or there would be some diplomatic row. The dismissal of the British Ambassador to Washington, Lord Mandelson, just a few days earlier was hardly an encouraging portent. As it turned out, the visit was a triumph that reasserted the special relationship. There was plenty of pomp and splendor, of course. Nothing wrong with that. Having the magnificent spectacle broadcast around the world did no harm at all to Trump or his...