Britain’s King Charles will have tea and a private meeting with President Donald Trump during his US state visit later this month, as the UK government hopes his “soft power” can heal a damaging rift between the allies caused by the Iran war. The monarch and his wife Queen Camilla head across the Atlantic on April 27, a four-day trip ostensibly to mark the 250th anniversary of US independence from Britain but one that now has far greater significance amid a growing spat between Trump and Prime...