Can Canada's potash be a trade war weapon in the fight against Trump tariffs?

Canada is vowing to fight back against U.S. President Donald Trump’s sweeping tariffs that went into effect Tuesday, and potash could become a potent weapon in the growing trade war — but economists are urging caution.

Potash is a key ingredient in fertilizer, and roughly 85 per cent of the supply used by American farmers comes from Canada — particularly Saskatchewan, where potash is a major export market.

U.S. farming groups and even some Republicans aligned with Trump have called for potash to be exempted from the blanket tariffs out of concern for the agricultural industry.

Global's Kyle Benning has the details.