President Donald Trump on Monday signed proclamations imposing additional 50% tariffs on certain goods from Canada in response to what the White House has called its North American neighbour’s “discriminatory treatment” of American products. The tariffs, which take effect in 30 days on Aug. 19, aggravate trade tensions between the two traditional allies and threaten higher inflation as the war in Iran continues to eat at American pockets. In retaliation for Canada’s tariffs affecting U.S. motor vehicles last year, the Trump Administration placed levies on a variety of Canadian goods—from certain electronics to sports equipment, from ornaments to flowers and flower products, and from essential oils to cowhides, among others.

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The tariffs will apply to goods covered by the Canada-U.S.-Mexico Agreement, escalating a trade dispute the White House says stems from Canada's policies targeting American autos,…

The U.S. is slapping 50% tariffs on Canadian products, including wine and hockey sticks, in response to Canada's retaliatory duties on American products.