India, April 30 -- Among Donald Trump's many unintended achievements during his first hundred days back in the Oval Office, one stands out north of the 49th parallel: He has given a leg up to Mark Carney, a political neophyte, to coast to a miraculous near-majority victory in the Canadian polls on Monday. The Liberals were trailing the Conservatives by 25 points in opinion polls in November thanks to former Prime Minister (PM) Justin Trudeau's unpopularity, but the emergence of an existential Trump challenge made Canadians turn to Carney as the caped saviour with the economic wand.

Carney, once governor of the Bank of Canada and later the Bank of England, now assumes leadership at a moment of rare peril and opportunity for Canada. Americ...