The real issue isn’t who won, it’s whether agreements still matter.

The public debate surrounding the opening of the Gordie Howe International Bridge has largely focused on one question: Who won? Did Canada successfully defend its interests, or did the United States secure concessions at the last minute?

The answer is surprisingly difficult to determine.

The financial arrangements governing tolls, net revenues, debt repayment, and the sharing of revenues are highly technical. Even after the revised agreement was announced, there remained considerable public confusion over how net revenues would be calculated, when Canada would recover its investment, and what the ultimate financial benefits would be for each country. The accounting is complex, and much of the public discussion has focused on competing interpretations of the numbers rather than on the broader implications.

What is far less ambiguous is the sequence of events.

Canada and the State of Michigan negotiated and signed a comprehensive legal agreement that established the framework for constructing the Gordie Howe International Bridge. Canada accepted responsibility for financing the bridge and related infrastructure, while the agreement set out the principles governing tolls, revenues, and long-term operation. On the strength of that signed agreement, Canada proceeded to invest billions of dollars and delivered its side of the bargain by completing the bridge.

Then, just weeks before the bridge was scheduled to open, the U.S. federal government delayed the opening until the financial arrangements were renegotiated. Those negotiations resulted in a revised agreement that altered important elements of the project’s financial framework before traffic was permitted to cross.

Reasonable people can disagree over whether Canada ultimately achieved a favourable outcome or whether the United States gained additional concessions. The financial consequences may not be fully understood for years.

But that debate misses the more important issue.

International commerce depends on confidence that agreements will be honoured. Governments, investors, and businesses commit billions of dollars to long-term projects because they believe that once contracts are negotiated, signed, and relied upon, the rules will not be rewritten after one party has fulfilled its obligations.

When a completed project can be held up until previously negotiated terms are reopened, it introduces uncertainty that extends far beyond a single bridge. It raises an uncomfortable question for every future international agreement: Is a signed agreement truly final, or is it simply the starting point for another round of negotiations once one side has already delivered?

This uncertainty now hangs over the forthcoming review of the Canada-United States-Mexico Agreement (CUSMA). Canada and Mexico enter those negotiations in a very different environment than they would have only a few years ago. The Gordie Howe experience demonstrates that even a formally negotiated agreement governing a major binational infrastructure project can be revisited after one party has fulfilled its commitments.

That does not mean a successful CUSMA negotiation is impossible. Nor does it mean that every agreement with the United States will meet the same fate. However, it does mean that Canada and Mexico have reason to approach the negotiations with greater caution. They will almost certainly seek stronger enforcement provisions, clearer dispute-resolution mechanisms, and greater protection against unilateral changes after agreements have been signed.

Trust is the most valuable currency in international negotiations. Once it is diminished, every future negotiation becomes more difficult, more complex, and more expensive.

The Gordie Howe International Bridge will strengthen one of North America’s most important trade corridors and benefit businesses and communities on both sides of the border. That is unquestionably good news.

Its broader legacy, however, may be a reminder that economic partnerships are built not only on trade and investment, but also on confidence that signed agreements will be honoured. When that confidence is weakened, it affects far more than a single bridge. It shapes how countries negotiate every agreement that follows including the next round of CUSMA negotiations.