Canada's prime minister and Mexico's president have ordered retaliatory tariffs against Americans, following through with their threats after U.S. Donald Trump sparked a trade war by imposing sweeping tariffs on imports from Canada,

Canada will retaliate against President Donald Trump'snew tariffs with 25% levies on a raft of U.S. imports, Prime Minister Justin Trudeau said on Saturday, warning Americans that Trump's actions would have real consequences for them.

President Trump is moving forward with extensive tariffs on America’s closest trading partners. Beginning Tuesday, companies bringing products into the United States from Canada and Mexico will pay a 25 percent tariff; importers bringing products in from China will pay an additional 10 percent on top of existing levies.