Hours after U.S. imposes tariffs, Canada says it'll strike back starting Sept. 8

Canadian Prime Minister Mark Carney says his country will initiate retaliatory tariffs against U.S. imports starting Sept. 8. The move came hours after the Trump administration began enforcing 50% tariffs on a slew of Canadian goods.

Trade negotiations between the United States and Canada fell apart Friday night, shortly before a midnight deadline for the 50% tariffs to take effect on $20 billion worth of Canadian products, including some dairy products, alcoholic beverages, cement and hockey equipment.