It’s official: Mark Carney has won the prize of prime minister. Now, he must figure out how to keep it. Carney comes to the job with a lot of pluses, chiefly his steady demeanour and economic experience, but also a pile of vulnerabilities. Already the Conservatives are gleefully exploiting them, branding him a liar, sellout, and globalist. They are saturating social media with memes and clever ads, trying to define him before he calls an election, which is likely imminent, considering the latest Nanos poll puts them a mere percentage point ahead of the Liberals.