Canada to impose 25% retaliatory tariffs on $21 billion worth of U.S. goods

1. Canada imposes 25% tariffs on $20 billion of U.S. goods. 2. Tariffs target steel, aluminum, and various other U.S. products. 3. European Union plans tariffs on over $28 billion of U.S. goods. 4. Economists warn tariffs threaten supply chains and increase prices. 5. Market uncertainty and downturn linked to tariff implementations.