As a public figure, Mr. Trudeau has always been a master of celebrity, so it’s fitting he’s now openly embracing its benefits. Mr. Trudeau is himself the child of celebrities: His father was the notoriously dashing prime minister Pierre Trudeau, and his mother, Margaret, was enough of a jet-setter to be profiled in Vanity Fair. Like Bennifer, Kimye, Tomkat and Brangelina before them, the coupling of Prudeau (Truderry?) can be seen as an inevitable, even organic, phenomenon.