It was bound to happen sooner or later. Ever since his election as Canada’s prime minister last October, Justin Trudeau has revelled in global tributes, raves and swoons. He’s the Disney prince with the trippy dance moves, the groovy Haida tattoo and the gender-balanced cabinet. He’s the last best hope for globalization, the star attraction at the Pride Parades, the hero of the Paris Climate Summit, the guy everyone wants a selfie with. Trudeau made himself synonymous with Canada. He made Canada cool again. It was fun while it lasted. By the early hours of Saturday morning, Havana time, Trudeau...