President Trump and the leaders of Mexico and Canada struck last-minute deals today to postpone hefty tariffs that the U.S. planned to impose tomorrow on goods from the two countries. The agreements temporarily averted a North American trade war.

Canada’s prime minister, Justin Trudeau, announced this afternoon that Trump had agreed to postpone tariffs against Canada for 30 days as the two countries negotiate a border deal. Hours earlier, President Claudia Sheinbaum of Mexico announced a similar pause after agreeing to a series of U.S. demands on border security, including a promise to send 10,000 more troops to the border. The U.S. is also expected to prevent the trafficking of high-powered weapons into Mexico.

The last-minute maneuvering demonstrated Trump’s willingness to use tariffs as leverage against America’s most important trading partners. Imports from Mexico, Canada and China, another target of tariffs, account for more than a third of the products brought into the U.S. each year.

Trump’s levies against China are still set to take effect tomorrow. He said he was planning to soon discuss the tariffs with China’s leader, Xi Jinping. However, the president described the 10 percent tariffs on Chinese imports as an “opening salvo.”

What’s next: Trump said he plans to soon turn his tariff threats toward Europe.