President Trump has threatened 25% tariffs on imports from Canada and Mexico, as well as an additional 10% tariff on imports from China. Here’s what you need to know.

World leaders from Canada to Europe to India reacted to President Donald Trump’s 25 percent tariff on all steel and aluminum imports that he says will take effect March 12 “without exceptions or exemptions.

The effort is one of a number of actions taken by Canada amid rising concerns of a trade war with its neighbour.