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Just the Facts: What’s Changed in U.S.–Canada Tariffs Since March 2025

Tariffs are surging on both sides of the border—here’s the updated reality.

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An American & Canadian flag waving in the wind

An American & Canadian flag waving in the wind

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The Fulcrum strives to approach news stories with an open mind and a spirit of inquiry, presenting our readers with a broad spectrum of viewpoints through diligent research and critical thinking. As best we can, remove personal bias from our reporting and seek a variety of perspectives in both our newsgathering and the selection of opinion pieces. However, before our readers can analyze varying viewpoints, they must have the facts.

In March of 2025, I wrote a column for The Fulcrum, Just the Facts: Canadian Tariffs, that set out to do something simple: strip away the rhetoric and explain, plainly, what tariffs between the United States and Canada actually were, what each country imposed, and why. That piece went on to become the most‑read article in Fulcrum history — more than 300,000 readers — because people were hungry for clarity in a debate that had become clouded by politics, slogans, and selective memory.


Eighteen months later, the facts themselves have changed. What was true in March 2025 is not fully true today. The tariff landscape is no longer a set of long‑running disputes over dairy, lumber, and steel. It has become a full‑scale tariff war — one with new legal authorities, higher rates, broader targets, and a collapse in trust between two countries that once prided themselves on the world’s most integrated economic relationship.

The rhetoric on both sides is stronger than ever, and sorting through it all is difficult. So, just like then, here are “Just the Facts”

The 2025 Baseline

In 2025, the tariff story was familiar:

  • Canada protected its dairy, poultry, and egg sectors with tariffs exceeding 200%.
  • The U.S. imposed duties on Canadian softwood lumber and maintained Section 232 tariffs on steel and aluminum.
  • Both countries operated within the framework of NAFTA/USMCA, with disputes but also stability.
  • The U.S. ran a trade deficit with Canada, driven largely by energy imports.
  • Supply chains were deeply integrated, and both economies benefited.

That was the world readers saw in March 2025. It is not the world we are living in now.

The U.S. Escalation: Section 338

The single biggest change since your 2025 column is the United States’ decision in mid‑2026 to invoke Section 338 of the Tariff Act of 1930 — a rarely used statute that allows the U.S. to impose tariffs up to 50% on goods from countries deemed to be discriminating against American commerce.

The U.S. imposed 50% tariffs on a wide range of Canadian exports, including:

  • Motor vehicles
  • Dairy products
  • Alcoholic beverages
  • Steel and aluminum products (on top of existing tariffs)
  • Dozens of consumer and industrial goods

This was not a symbolic move. It applied to roughly $20 billion of Canadian exports and represented the maximum tariff allowed under Section 338. It also applied even when goods otherwise qualified under the USMCA — a major departure from the trade rules that had governed North American commerce for decades.

Canada’s Response: Retaliatory Surtaxes

Canada responded in September 2026 with its own escalation: retaliatory tariffs of 15%, 25%, and 50% on more than 700 U.S.‑made products.

These included:

  • Cheese, seafood, and processed foods
  • Clothing, cosmetics, and household goods
  • Appliances, electronics, and industrial equipment
  • Steel, aluminum, and agricultural machinery

Canada had rolled back many retaliatory tariffs in earlier years. Now it is re‑escalating — and doing so at scale.

Negotiations Have Broken Down

In 2025, the U.S. and Canada were arguing. In 2026, they are not even talking.

Negotiations collapsed in August 2026, with each side accusing the other of bad faith. The U.S. described Canada’s actions as “retaliation,” while Canada accused the U.S. of using “economic integration as a weapon.” The deterioration of political trust is now part of the factual landscape.

The Economic Relationship Has Shifted

In 2025, the defining feature of U.S.–Canada trade was integration. Today, integration persists, but it has become a vulnerability.

Tariffs now hit the very sectors that bind the two economies together:

  • Autos and auto parts
  • Steel and aluminum
  • Agriculture and food processing
  • Electronics and machinery

Businesses face higher costs, more uncertainty, and more compliance risk. Importers have to navigate new tariff schedules, new classifications, and new rules about goods already in transit. The administrative burden is now part of the economic impact.

The Trade Imbalance Still Exists — But the Meaning Has Changed

The U.S. still imports more from Canada than it exports, largely because of energy. But the significance of that imbalance has shifted. In 2025, it reflected integration. In 2026, it reflects exposure: tariffs now hit sectors that feed directly into U.S. manufacturing, transportation, and consumer markets.

What Hasn’t Changed

Some fundamentals remain:

  • Canada still protects dairy and poultry with high tariffs.
  • The U.S. still maintains long‑running duties on softwood lumber.
  • Both countries still depend heavily on each other economically.

But these constants now sit inside a much more changing environment.

Where Things Stand Now

The U.S.–Canada tariff relationship has moved from dispute to confrontation. The legal tools being used are more aggressive. The tariff rates are higher. The number of affected products is larger. And the political trust that once stabilized the relationship has eroded.

The facts today are sharper than they were in March 2025. And they matter more — for farmers, manufacturers, consumers, and the millions of workers whose livelihoods depend on international trade.

The rhetoric will continue. But the facts are clear:

North America’s trade relationship has entered a new phase — one defined not by integration, but by escalation.

David Nevins is the publisher of The Fulcrum and co-founder and board chairman of the Bridge Alliance Education Fund.


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