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OTTAWA — The trade war between the U.S. and Canada took another turn Tuesday as U.S. President Donald Trump threatened to double the tariff on steel and aluminum imports coming from Canada.
Trump said the move was meant to respond to Ontario’s surcharge on electricity exports, which Ontario Premier Doug Ford later agreed to suspend pending a meeting with U.S. Secretary of Commerce Howard Lutnick.
Should Trump’s 50 per cent tariffs proceed, they would apply to Canadian steel and aluminum starting Wednesday, up from the 25 per cent tariffs that were previously expected to apply to those materials.
That comes amid the backdrop of a larger fight which last week saw Trump hit Canada with broader tariffs before partially pausing them for a month. Canada responded with retaliatory tariffs, and markets have fallen as investors brace for the economic impact the duties will have on both sides of the border.
Canadians confused about Trump’s plans aren’t alone, with the U.S. president at times contradicting himself about his own tariff promises.
Here’s what has happened so far, and some key dates coming up as Canada is officially in a trade war with its biggest trading partner.
March 4
Trump initially signed an order on Feb. 1 imposing blanket tariffs of 25 per cent on virtually all goods entering the U.S. from Canada and Mexico, and a reduced 10 per cent tariff on energy, set to begin on Feb. 4.
But a few days later on Feb. 3, he “paused” the implementation of those tariffs for 30 days as Canada pledged action to secure the border.
Trump’s Feb. 1 order also imposed 10 per cent tariffs on goods entering the U.S. from China, which have gone ahead.
There were hopes that the border security measures Canada took during the month-long pause could stave off the tariffs, but on March 3 Trump confirmed they would go ahead, which they did.
Prime Minister Justin Trudeau announced broad retaliatory tariffs on U.S. goods including food, alcohol, furniture, paper and more.
March 5
Trump pledges a one-month exemption for vehicles traded under the Canada-U.S.-Mexico Agreement, also known as CUSMA.
White House Press Secretary Karoline Leavitt said during a briefing that the move comes after the Big Three automakers — Stellantis, Ford and General Motors — asked for an exemption.
March 6
Finance Minister Dominic LeBlanc says Ottawa will suspend a second wave of retaliatory tariffs after Trump signed an executive order Thursday to pause some new duties on Canada and Mexico and reduce potash levies to 10 per cent.
Trump’s order linked the tariff relief to maintaining the flow of automobile parts that comply with CUSMA and to helping farmers who need potash for fertilizer.
An explanatory statement issued by the White House said there would be no tariffs on goods from Canada and Mexico that claim and qualify for CUSMA preference.
March 12
Trump followed up his initial tariff orders with a new salvo launched against steel and aluminum exporters. On Feb. 10, he signed a plan to institute 25 per cent tariffs on all steel and aluminum entering the U.S., ending previous exemptions for Canada.
Those tariffs were to take effect March 12.
But a day prior, Trump said he would double the rate to 50 per cent. Trump said on Truth Social, the social media platform he owns, that the move is in response to Ontario placing a 25 per cent surcharge on electricity it exports to the U.S.
It’s unclear if Trump will follow through on that threat after Ford agreed to suspend the province’s export tax by Tuesday afternoon. Ford said he and Lutnick “had a productive conversation about the economic relationship” between the two countries and planned to meet in Washington on Thursday.
The new taxes on steel and aluminum would stack on top of the existing tariffs.
April 1
On Trump’s first day in office, he signed an executive order to enact the “America First Trade Policy.”
That order called for his trade and commerce officials to report back to him by April 1 on a sweeping review of U.S. trade policy and relationships.
That date does not come with an imposition of any tariffs by default, but does direct Trump’s administration to begin examining the Canada-U.S.-Mexico Agreement, which Trump signed in 2018, ahead of a planned 2026 review.
April 2
In a Feb. 27 Truth Social post, Trump said that April 2 would mark the start of “reciprocal” tariffs, which would apply to goods coming in from countries that have tariffs on U.S. goods.
These would be on top of other tariffs and would match the rates charged by other countries, including subsidies and value-added taxes.
Trump has given little indication on the scope these reciprocal tariffs would take, but he signed a memorandum on Feb. 13 directing his trade czar to examine what he perceives as unfair trade practices from other nations.
A fact sheet accompanying that memorandum flagged Canada’s digital services tax targeting tech giants doing business in the country as one such measure the U.S. might like to see addressed with reciprocal tariffs.
Trump has also threatened to levy tariffs on imported automobiles coming into the U.S.
He said on Feb. 14 that those tariffs could come “around April 2,” adding the following week that the levies would be “in the neighbourhood of 25 per cent.”
Around the same time, he floated imposing similar tariffs on pharmaceuticals and semiconductors, but has yet to provide a timeline for those.
— With files from The Associated Press
This report by The Canadian Press was first published March 11, 2025.
The Canadian Press