New British Prime Minister Andy Burnham exchanged messages with someone posing as Susie Wiles, the White House chief of staff, several media outlets reported on Monday. According to Politico, which broke the story quoting anonymous sources, the British leader sent a “few messages” via an unspecified communication channel to a person he believed to be Wiles before becoming suspicious. The incident was deemed serious enough for the British embassy in Washington to raise the matter with the White...