On Monday, U.S. President Donald Trump vowed to follow through on his economic threat against North American neighbours – his government plans to impose 25 per-cent tariffs on goods from Canada and Mexico. In response, the Canadian government said it would retaliate with tariffs of its own. The tariff plan disrupts Canada’s most important economic relationship and would effectively throw the two nations into a trade war.

Nojoud Al Mallees is The Globe’s economics reporter. She explains exactly what Trump said he’d do, what tools Canada can use to fight back and the serious pressure the economy could soon be under.

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