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

Canada confirmed Monday that retaliatory tariffs on U.S. imports will take effect early Tuesday, marking a fresh escalation in the deepening trade dispute...

Canada struck back at U.S. President Donald Trump on Tuesday with tariffs on about $20 billion worth of U.S. goods. The outcome could resonate far beyond Canada.

Canada has implemented retaliatory tariffs on American products after trade negotiations collapsed last month. These new duties affect twenty billion dollars worth of United…