US and Canada trade dispute deepens as new tariffs take effect

Canada is set to announce retaliatory tariffs on Tuesday after the United States imposed 50 percent duties on a range of Canadian goods, affecting roughly $20 billion in annual exports. The measures follow the collapse of last-minute negotiations, with Ontario's premier warning that his province could cut off electricity and critical minerals if the conflict escalates. The dispute marks a sharp deterioration in what was once one of the world's most stable trade partnerships.