The $4-Billion Tab: What Trump's Trade War Will Cost Canadian Households

Canada's counter-tariffs on $28 billion worth of U.S. goods kicked in Tuesday, and here's the sticker shock: economists estimate the retaliatory duties will cost Canadian consumers $4 billion, falling hardest on lowest-income households. PM Mark Carney warned the trade conflict "will come at a cost" — he just didn't say how much.

• What's in play: 15-50% tariffs on U.S. goods from toilet paper to cutlery, motorcycles to refrigerators
• Who pays: You...