Karim Walji is certain he is about lose business. Worried he may have to shrink his workforce — fire people — for the first time in eight years. He blames President Donald Trump and what Walji sees as a reckless power trip.

If tariffs evolve from a negotiating tactic to a new normal, economic and diplomatic costs to all of North America will grow.

Canada is delaying its plan for a second phase of retaliatory tariffs against the US after President Donald Trump exempted Canadian and Mexican goods covered by the North American trade agreement.