A masterful act of British diplomacy, deploying royal pomp, pageantry and ceremony in pursuit of the national interest. Or a desperate example of groveling to a fickle American president with a frail ego. Photos of a glittering banquet in Windsor Castle and of Mr. Trump’s procession through its grounds in a horse-drawn carriage adorned newspaper front pages. But the divide in perceptions was best illustrated by the front pages of two tabloids. The Sun, known for its conservative bent and sensational headlines, is part of News Corporation, which is owned by Rupert Murdoch, who attended the banquet.