The Canadian Prime Minister’s double standards have been remorselessly exposed by a corruption scandal.

How Justin Trudeau’s liberal halo slipped

What happens when an entire government’s reputation is premised on a single figure and his personal brand? As long as the latter can be sustained, most political damage can be absorbed. But when a leader’s profile begins to lose its lustre, the consequences are severe.

Whatever its precise ideological character, this is the fatal flaw of personality politics – as Canada’s pin-up prime minister Justin Trudeau and his Liberal government have now learned.