US President Donald Trump’s 10-per-cent tariff on Canadian aluminum imports has officially taken effect, despite Canada’s plan to hit back with significant countermeasures. Trump claimed that the American aluminum business has been “decimated” by Canada, a claim that has been disputed by companies on both sides of the border. Canada plans to impose $3.6 billion in countermeasures on a large number of aluminum products, though the specifics have not yet been announced.
