US-Canada trade war: how the feud began and how it ends

A PBS NewsHour panel asks how two allies with intertwined economies ended up on the verge of unwinding. Here is what it means for founders and business owners.

For most of living memory, the border between the United States and Canada was the kind of line you noticed only when you were standing on it. It is often called the world’s longest peaceful border, and for decades the economies on either side behaved less like two countries and more like one large neighborhood. That is why the US-Canada trade war feels so strange to so many people. The neighbors are arguing, and nobody is quite sure how it ends.

A recent PBS NewsHour panel moderated by Nick Schifrin tackled exactly that question: how did two allies with deeply intertwined economies end up on the verge of unwinding, and where does the relationship go next? Shuvaloy Majumdar is a Canadian member of parliament, Christopher Sands has spent his career studying the US-Canada relationship, and Robert Zoellick is a former US trade representative and former president of the World Bank. I want to ask a more practical question: what does the feud mean for the people who have to make payroll next month?

How the feud began

Every long friendship has a moment when the rules quietly change and one side notices before the other. For Canada and the United States, that moment came when trade stopped being a technical topic for negotiators and became a political weapon wielded from the very top.

Tariffs and counter-tariffs were the visible instrument. The deeper wound was rhetorical. When leaders in Washington began talking about Canada as if its sovereignty were up for discussion, many Canadians heard something they never expected from their closest ally. Trust, once it starts to leak, is hard to refill.

The economic reality underneath makes the fight more painful. Parts for a single vehicle can cross the border several times before the car is finished, and countless small suppliers on both sides built their business on the assumption that the line on the map did not matter. The panel’s framing is blunt: this is a relationship on the verge of unwinding, not a spat that blows over by the weekend.

Why this matters to your business

It is tempting to file the US-Canada trade war under “politics” and get back to work. That would be a mistake. A trade dispute between economies this intertwined does not stay in the headlines. It shows up in your input costs, your customers’ budgets and your competitors’ pricing, often long before a tariff line appears on an invoice.

What actually changes when a stable trading relationship turns unstable?

• Pricing gets harder to promise. A quote that used to hold for a quarter suddenly needs a footnote about policy changes beyond your control.
• Contracts get longer. Who absorbs a new tariff, the buyer or the seller? If that clause is not in your agreement, you are holding the bag.
• Suppliers start hedging. When your best vendor quietly opens a second facility on the other side of the border, that is a signal, not a coincidence.

We have argued before that geopolitical risk has become a business variable, something to plan for rather than be surprised by. The US-Canada feud is the clearest example yet, precisely because almost nobody had it on their risk register a few years ago.

The hidden cost is not the tariff, it is the uncertainty

A known tariff is manageable. You can price it, pass it on or design around it. What businesses cannot manage is a rule that changes every few weeks, a threat that may or may not become policy, and a negotiation whose deadline keeps moving.

That is why so many eyes are on the review process built into the North American trade agreement, known as USMCA in the United States and CUSMA in Canada. A review is a rare moment when uncertainty can be resolved, or made permanent.

How it could end

The panel’s title promises a way out, so it is fair to ask what that looks like. I see three realistic paths, and only one of them is comfortable.

A negotiated reset. Both governments use the review to write down new rules, both claim a win, and businesses get something they can plan around. This is the outcome most business owners are quietly hoping for.

A managed drift. No dramatic break, but no real repair either. Canada keeps courting other trading partners, American firms keep pulling production home where they can, and the border slowly becomes something you notice again. This is the hardest path to plan for, because it never announces itself.

A real rupture. Tariffs become permanent, supply chains are rebuilt along national lines, and a generation of cross-border businesses becomes collateral damage. Unlikely, but no longer unthinkable, which is exactly the point.

What makes the exit so hard is that this was never only about trade, and you cannot fix a trust problem with a tariff schedule.

For a founder, the honest lesson is about timing. There is a version of patience that is really just denial. Knowing when to quit a strategy built for a world that no longer exists, and start building for the one that does, may be the most valuable skill of the decade.

What to learn from this

The US-Canada feud is a case study in how quickly a safe assumption turns into a risk. Here is what I would take from it, wherever your business sits.

• Map your exposure before someone else does. Which suppliers, customers and price points depend on cross-border trade behaving the way it used to? Write it down. Most companies never have.
• Do not let one relationship carry the whole business. We have written about the risk a company carries when everything hinges on one founder or one product. A single market or a single border is no different.
• Put the tariff clause in the contract now. Not after the next announcement. Clarity about who pays is worth more than a slightly better price.
• Check the facts before you react. In a feud this loud, rumors move faster than policy. The habit of verifying a claim before you act on it applies to trade headlines as much as to viral history posts.

The era in which geography did your risk management for you is over. The world’s longest peaceful border was never a law of nature. It was a decision, renewed every year by people who thought it was worth it. The businesses that come out ahead will be the ones that stopped treating the border as invisible and started treating it as a variable. If you want the full conversation, the PBS NewsHour episode is embedded below.

The neighbors are arguing, and nobody is quite sure how it ends.

A known tariff is manageable. A rule that changes every few weeks is not.

The world’s longest peaceful border was never a law of nature. It was a decision.

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Sources

• How the U.S. and Canada fell into a feud – and how it could end (PBS NewsHour, Compass Points) — Panel moderated by Nick Schifrin with Shuvaloy Majumdar, Christopher Sands and Robert Zoellick, published 4 September 2026.