TORONTO — Roughly $900 billion in annual trade between Canada and the United States — and with it, traditionally chummy bilateral ties — is on the brink of upheaval, with President Donald Trump threatening to impose sweeping tariffs on Canada as early as this weekend.

President Donald Trump has already forced Colombia to accept deportees by threatening tariffs and is readying the same move against Canada and Mexico as soon as Saturday.

Canada is prepared to offer pandemic-level financial support to workers and businesses if the US imposes tariffs. Officials emphasize that workers should not bear the costs of US decisions, referencing past Covid-19 responses as a model for potential aid.