US imposes 50% tariffs on $20 billion worth of Canadian products, and Canada says it will retaliate

The United States imposed 50% tariffs on $20 billion worth of Canadian products, prompting Canada to announce immediate retaliation. This trade escalation followed the failure of last-ditch negotiations regarding concessions on items such as steel, aluminum, autos, and lumber. The dispute calls into question the future of a North American trade pact involving the United States, Canada, and Mexico.