In the hours before Canadian Prime Minister Justin Trudeau announced a 30-day pause on US President Donald Trump’s threatened 25% tariff on Canadian goods, the co-founder of one of Canada’s largest auto parts manufacturers was bewildered.

Ms Sheinbaum (pictured) won praise at home and abroad for her handling of her mercurial American counterpart. Throughout the confrontation her demeanour was respectful but firm. When Mr Trump ordered tariffs on February 1st, she told her team to prepare countermeasures, but did not publicise the details.

Trump on Saturday had directed that 25% tariffs on most imports from the two American partners — and 10% on Canadian energy products — go into effect at midnight Tuesday.