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

Mr. Trump is trying use tariffs to force Mexico to better guard its border with the United States, but Mexican officials say the tariffs will only hurt both countries.

American importers will pay a new 25 percent tax on goods from Canada and Mexico and a 10 percent levy on products from China.