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Trump Has His Finger on Canada’s Kill Switch

Patriotic defiance means little if Washington can shut off the systems we need

Sovereignty is a many-splendoured thing. At its core, it means a state enjoys independence and exercises authority over a defined territory and population. If you can defend your borders, and other countries recognize your right to do so, then presto: you’re sovereign.

This framework is helpful as a starting point, but as with any complex concept, the definition obscures as much as it illustrates. In a thoroughly globalized world, a country can be sovereign and yet remain subject to the merciless influence—and even outright control—of external actors. Canada has become a prime example. It is, by all accounts, sovereign. The place on the map is ours. So are the laws, the elections, the flag. Yet, on issue after issue, the United States and key corporate supporters possess enormous leverage over the Great White North: leverage that reaches deep into systems of Canadian life. Payment networks can be frozen. Cloud systems flicked off. Software licences revoked. Supply chains throttled. Visibility online can vanish overnight. Canadians may run the country, but others hold the kill switch.

The term gained currency during debates over Canada’s 2023 agreement to buy eighty-eight F-35 fighter planes to replace its decaying CF-18 fleet, at an estimated cost of $19 billion. Ottawa has since launched a review of that purchase, with experts questioning whether an American-made jet that can be manipulated from afar is the best choice for Canada. It led a Canadian pundit to bluntly ask, “Does Trump have his finger on the ‘kill-switch’?” Stealth fighters are deeply reliant on American software updates, computer networks, and spare parts. That level of technical dependence raises an even unsettling question: How sovereign is your military if another country could, in a crisis, disable or degrade your equipment?

Unsurprisingly, the Pentagon has tried to reassure partners. But it’s hard to ignore Donald Trump publicly musing about selling inferior weaponry to allies—and his administration explicitly limiting intelligence and F-16 jet support to Ukraine in the midst of its conflict with Russia. The US also reportedly threatened to cut off Ukraine’s access to Starlink, the Elon Musk–owned satellite network crucial to its drone effectiveness, unless the country reached a deal on mineral rights. In October 2026, Musk went ahead and throttled the service, seemingly for his own reasons. The message is clear: lean on US systems and Americans gain a direct say over how, or even whether, your country defends itself.

And defence is only the beginning. Out of convenience, efficiency, and decades of integration, Canada has handed the US kill switches throughout its economy and society. That Canada, by history and geography, is an ally makes no difference. In some ways, it may even make things worse.

Kill switches were not what anyone advertised when Canada’s economic ties with the US were being built. In happier times, the promise was pooled sovereignty, where countries agreed to limits on their authority for greater shared gains. Thus, Canada signed a free trade agreement with the US, and later with Mexico, transferring internal economic governance to international tribunals. A country could always walk away from an agreement, but the pain in doing so steadily increases as integration deepens—what economists refer to as path dependency. Canada and the US have become deeply integrated indeed. This makes each vulnerable to the other, but given the scales involved, that vulnerability is decidedly unequal.

Some areas of integration are obvious and widely discussed. The US buys Canadian oil, and Canada buys American services. The auto industry is so tightly integrated across Canadian, American, and Mexican borders that in some ways it’s more correct to say vehicles are built collectively than by one country or the other. Recent negotiations over Canada–US trade focused on mitigating the interruption in these relationships from tariffs and quotas. Canada has limited leverage in these talks, as it can do only so much to manipulate trading patterns. It would be possible, if controversial, to impose an export tax on the energy we sell to the US, but it would not be realistic to simply stop the sale outright. Simply put, Canada lacks the infrastructure to sell to anyone else. An additional pipeline carrying Alberta bitumen to the Pacific coast—and from there by tanker to Asian markets—would mitigate but not fundamentally change that fact.

Some new threats are equally obvious as well. When the US included a right of first refusal on Canadian natural resource exports during trade talks this summer, it was explicitly demanding a greater say in Canada’s international trade, constraining our ability to decide who to sell to. That’s an attack on Canadian sovereignty. Prime Minister Mark Carney walked away. To agree would have been to take a step toward formal imperialism and US domination of Canada’s economy. A bully like Trump can find no end of uses for a kill switch once he knows it works.

Trade is only the tip of the toggle, as it were. A century of American investment has ensured significant shares of vital economic sectors are effectively owned by American interests. Nor is that about to change. Carney is courting foreign money to dig mines, build energy corridors, expand ports, and fill data centres with computing power. JPMorgan, Blackstone, BlackRock, and KKR were among the American giants at his vaunted investment summit in September. These are the companies answering Canada’s call to build a........

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