Canadian officials were informed that goods exported to the United States will be subject to a 25 percent tariff, with a lower rate for Canadian oil, starting on Tuesday.Credit...Ian Willms for The New York Times Trump tariffs: President Trump on Saturday followed through with his threat to impose stiff tariffs on Mexico,

Mr Trump’s announcement of the new duties ought to erase any doubts about his resolve to take a hard line on trade, heedless of warnings from businesses, diplomats and economists about the potential fallout.