After a shocking electoral upset the public is growing increasingly weary of his tenure – and of his Liberal party

A Canadian prime minister who has outstayed his welcome, persistent inflation, a government bumped and bruised by scandal and a fired-up opposition leader itching for a public showdown.

It was against this backdrop, four decades ago, that Pierre Trudeau took his apocryphal “walk in the snow” and decided not to contest the next federal election.