Trump’s 50% tariff on Canada is a warning to the rest of the world

On Monday, President Donald Trump announced a 50% tariff on Canadian imports, marking one of the steepest duties to take effect since the Supreme Court struck down his most sweeping tariffs earlier this year.

​ On Monday, President Donald Trump announced a 50% tariff on Canadian imports, marking one of the steepest duties to take effect since the Supreme Court struck down his most sweeping tariffs earlier this year. Read More Breaking News, Latest News and Videos | CNN