The duties are a retaliation against President Trump’s recent tariffs, raising concerns about further escalation. Canada's steep retaliatory tariffs on $20 billion in U.S. Key points and original sources are listed below.

• The duties are a retaliation against President Trump’s recent tariffs, raising concerns about further escalation.S1

• Canada's steep retaliatory tariffs on $20 billion in U.S. goods took effect just after midnight ET on Tuesday, extending the trade war between the two countries.S2

• Countervailing Canadian tariffs against the United States officially came into effect at midnight on Tuesday. The measures are set to impact $27.6 billion worth of American goods, such as dairy products, plywood and sunscreen. Hours before the counter-tariff d...S3