Mr Trudeau’s Liberal Party suddenly finds itself atop some opinion polls for the first time in almost two years, having scraped historic lows just two months ago. Mr Trump’s unsettling and relentless insistence that Canada join the United States as its 51st state or face staggering tariffs has cracked the basis on which Canada’s Conservatives and their leader,

The prominent central banker and investor was chosen in a crucial leadership race amid threats from President Trump. He is expected to quickly call a federal election.