On January 6th Justin Trudeau, Canada’s prime minister, announced his resignation. Over the past year he has became an isloated and deeply polarising figure as supporters have abondoned his Liberal Party, angry that it has failed to tackle inflation, housing costs and the strains from high immigration. In the coming weeks the Liberals will be gripped by a leadership struggle. Potential replacements include Mark Carney, who ran the Bank of England, and before that the Bank of Canada; Chrystia Freeland, whose surprise resignation as finance minister precipitated the crisis that forced Trudeau out; and Dominic Leblanc, who succeeded Freeland as finance minister.