US President Donald Trump has appointed Nick Adams, the Australian-American social media influencer and self-styled “alpha male”, as special presidential envoy for American tourism, exceptionalism and values. “I look forward to serving as America’s brand ambassador, bringing the message of America’s excellence to the entire world,” Adams wrote on X, the social media site formerly known as Twitter. “With America 250, the Fifa World Cup and the Olympics coming up, the world needs to be reminded of...