President Trump signed three proclamations imposing an additional 50 percent tariff on Canadian autos, alcohol and dairy products, plus cement and hockey sticks, using a Depression-era trade law that has not been invoked this way in more than 75 years.
Donald Trump signed three separate proclamations Monday imposing an additional 50 percent tariff on Canadian motor vehicles, alcoholic beverages and dairy products, invoking Section 338 of the Tariff Act of 1930, a Depression-era statute so rarely used that no administration has applied it for this purpose in living memory. The White House fact sheet says the tariffs answer years of Canadian trade barriers that American automakers, vintners and dairy farmers have absorbed without reciprocity, and Trump's proclamations single out Ottawa for what the administration calls discriminatory treatment of U.S. exports.
Each proclamation covers a different slice of the Canadian economy. One targets motor vehicles. Another hits alcohol, including wine. A third covers dairy and cheese, plus cement and hockey sticks. All three apply regardless of whether the goods qualify for duty-free treatment under the U.S.-Mexico-Canada Agreement, according to the White House. Energy, potash, fish and critical minerals are carved out, along with goods already covered under separate Section 232 tariffs. The new duties take effect in 30 days, putting the start date around August 19.
Section 338 has sat mostly untouched since the 1940s. Legal analysts note there is no public record of it being used for this purpose since 1949, and its revival comes after the Supreme Court curtailed the emergency powers Trump had relied on for his broader tariff program under the International Emergency Economic Powers Act. With that avenue narrowed, the administration turned to a statute that lets the president impose duties of up to 50 percent on any country found to discriminate against American goods, a power Congress wrote into law nearly a century ago and never repealed.
A senior administration official acknowledged the approach is untested and that a legal challenge from importers or Ottawa is likely. That risk did not stop the White House from moving. Trump's dairy proclamation accuses Canada of favoring European cheese imports over American dairy under its supply management quota system, a complaint U.S. producers have made for years without a fix. On alcohol, the administration points to a step Canadian provinces took last year: nearly every province and territory pulled American beer, wine and spirits from government-run liquor stores in retaliation for earlier Trump tariffs, a boycott U.S. producers say cost them shelf space they have not recovered.
Ottawa stays quiet, for now
Mark Carney has not announced retaliation. The Canadian prime minister sat with Trump at the World Cup final in New Jersey on Sunday, one day before the proclamations were signed, but a senior U.S. official said the two did not discuss trade, calling it "not a visit to talk about trade and tariffs." Canadian officials have not said whether they will impose countermeasures, a departure from the swift retaliatory tariffs Ottawa rolled out during earlier rounds of this trade fight.
The silence may not last. Canada's dairy and auto sectors are significant exporters to the U.S. market, and provincial governments that pulled American liquor off shelves last year already showed a willingness to hit back economically rather than through Ottawa alone.
For American consumers, the exclusions matter as much as the tariffs themselves. Keeping energy and potash off the list protects U.S. drivers from a spike at the pump and shields American farmers from higher fertilizer costs, since Canada supplies roughly 80 percent of the potash used on U.S. farmland. But autos are a different story. Canadian parts and assembly are woven through North American vehicle supply chains, and a 50 percent tariff on Canadian-built vehicles and components will likely show up in sticker prices for buyers, at least on models still routed through Canadian plants.
The White House is betting that a narrow, sector-specific tariff aimed squarely at proven Canadian trade barriers will hold up better in court than the broad emergency tariffs the Supreme Court just reined in, while still forcing Ottawa to answer for policies American farmers and automakers have complained about for years. Whether Section 338 survives its first legal test in more than 75 years, and whether Carney answers with tariffs of his own, will determine if this dispute cools before the 30-day clock runs out or becomes the next front in a trade fight that has already reshaped how the two countries do business.
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