Provincial and opposition leaders also called for blocking exports of Canadian oil, electricity and critical minerals in what could devolve into a trade war.
But Alberta Premier Danielle Smith pushed back against any disruption of the more than three million barrels of oil shipped daily from her province to the United States - showing cracks in Canada’s unified response.
“Alberta will simply not agree to export tariffs on our energy or other products, nor do we support a ban on exports of these same products,” she posted on X.
Doug Ford, the premier of Ontario, the nation’s most populous province and its economic engine, bristled at her remarks, telling reporters: “When Donald Trump comes at us ... he’s coming full tilt at Canadians as a whole.
“Protect your jurisdiction but country comes first,” he said.
Nearly 77% of Canadian exports go to the United States, which in 2023 represented about C$548b worth of goods.
Energy at C$166b, and motor vehicles and parts at C$82b from Ontario, are the largest single exports.
Ford warned this week that 500,000 jobs in Ontario alone are at risk if Trump makes good on his tariff threat.
Earlier in the day, officials provided details of Canada’s plan to strengthen border security, including the deployment of drones and Black Hawk helicopters to patrol the 8891km frontier, starting Friday.
© Agence France-Presse