Canada Promises Retaliatory Tariffs as US Talks Collapse

U.S. President Donald Trump's 50% tariffs on Canadian goods took effect Saturday, prompting Prime Minister Mark Carney to promise dollar-for-dollar retaliatory tariffs starting Sept. 8. The new levies affect roughly $20 billion in Canadian exports, including agricultural products and hockey sticks, raising prices for American companies and consumers. Canada walked away from negotiations Friday, with Carney accusing Washington of using "economic integration as a weapon." Trump's trade negotiator Jamieson Greer pledged additional measures against Canada's retaliation without specifics. The tariffs also apply to some goods previously protected under the USMCA trade pact, raising questions about the agreement's future.