Behind the Tariff bluster lies an inconvenient truth for Washington: US refineries, grids and gas networks are wired to run on Canadian energy. Reversing that dependence is neither quick nor cheap.

The dependence Washington downplays

“We don’t need Canada,” US President Donald Trump declared as trade talks collapsed and his administration imposed 50 per cent tariffs on some US$20-billion of Canadian goods. On energy, at least, the claim collides with the plumbing of the American economy. In 2025, Canada supplied 63.4 per cent of all US Crude Oil imports, close to 100 per cent of its Natural Gas imports, and 81.3 per cent of its electricity imports. These are not marginal contributions at the edge of the American market; they are structural inputs to how the United States refines fuel, heats homes and keeps the lights on in several border states. The rhetoric of independence is easy to broadcast. The infrastructure tells a more complicated story — one in which the world’s largest economy leans on its northern neighbour far more than the politics admit.

Why Gulf and Midwest refineries need heavy crude

The most durable dependence is in crude oil. Canada shipped 3.9 million barrels a day south in 2025, worth C$126.1-billion, and much of it is heavy crude of a kind US refineries in the Midwest and along the Gulf Coast were specifically configured to process. Those plants invested for decades in the complex “coking” equipment that turns dense Canadian barrels into diesel, jet fuel and gasoline. Lighter domestic Shale Oil is not a drop-in substitute for that hardware.

The crude also arrives by fixed pipeline — the Enbridge Mainline, Keystone and, to tidewater, Trans Mountain — binding specific Canadian production to specific American refineries. That physical marriage is why the dependence is real: a Gulf refiner cannot simply summon 400,000 barrels a day of equivalent heavy crude from elsewhere without cost, delay and, in some cases, refits. It is also, tellingly, why the relationship is mutually captive, a point that shapes any talk of leverage.

The grid that runs on Canadian power

Electricity tells a similar story in a smaller frame. Canada supplied 81.3 per cent of American electricity imports in 2025, 32.7 terawatt-hours worth C$3.3-billion, drawn largely from hydro dams in Quebec, Ontario, Manitoba and British Columbia. The beneficiaries are concentrated: New York, New England, Michigan and Minnesota draw on Canadian power to balance their systems, particularly at peak demand.

That geographic concentration is what gives the flow its bite. This is not diffuse national dependence but a handful of states and utilities wired directly into Canadian hydro. The point was made vividly in 2025, when Ontario briefly threatened and then applied a Surcharge on electricity exports to New York, Michigan and Minnesota before pausing it — a small-scale demonstration that a Canadian province can reach directly into American electricity bills.

Gas, and the near-total reliance

Natural gas is where the dependence is most complete. Canada accounts for close to 100 per cent of US natural gas imports, sending 8.6 billion cubic feet a day across the border, worth C$12.5-billion. The United States is itself a major gas producer and net exporter, so the national exposure is smaller than the headline share suggests. But regional pipeline networks in the US Northeast and upper Midwest are built to draw on Canadian gas, and swapping Supply routes is a matter of Capital and years, not weeks.

Canada, for its part, has begun to diversify. LNG Canada at Kitimat, British Columbia, now exports a modest 0.295 billion cubic feet a day to East Asia — a fraction of the Volume sent south, but a signal that Ottawa is slowly building alternatives to the single American customer that has long defined its energy trade.

From dependence to Leverage — the hard part

Dependence, however, is not the same as leverage, and this is where the story turns. The very features that make the United States reliant on Canadian energy — fixed pipelines, purpose-built refineries, hardwired grids — also lock Canadian producers into American buyers. Alberta’s heavy crude has few other places to go; Quebec’s surplus hydro cannot be rerouted to Asia. A supplier that depends on a customer as heavily as the customer depends on the supplier holds a weapon that wounds the wielder.

There is a time dimension, too. Energy leverage is slow: the pain from a Canadian squeeze would build over months, while the political cycle in Washington moves in news days. And it invites adaptation. Push too hard and American utilities accelerate their own generation, refiners retool for domestic crude, and buyers write Canada down as an unreliable partner — surrendering the long-term custom that is Canada’s real prize.

Ottawa’s calculated restraint

This is why the federal government has, so far, declined to reach for the energy lever. Earlier in 2026, Mr. Carney said Canada would not “leverage” energy and critical minerals in the trade talks, and the retaliation he announced for September 8 — a roughly C$28-billion dollar-for-dollar package targeting steel, dairy, appliances, farm equipment, pulp and paper, and electronics — pointedly leaves energy untouched. Even as he reminded Americans that Canada “fuels American growth,” the Prime Minister has treated that fact as a source of standing rather than a trigger to pull.

Provinces have been more restless. Ontario’s Doug Ford, whom Mr. Trump publicly told to “get lost,” has been among the hawks pressing for a harder line on electricity. The result is a country whose leverage is genuine but whose willingness to use it is contested — divided between a cautious capital and more combative provincial capitals.

A quiet source of strength

The takeaway is not that Canada should unleash its energy dependence as a weapon, but that Washington’s dismissiveness is misplaced. The United States does need Canadian energy — more, and for longer, than the “we don’t need Canada” line implies — and that reality quietly conditions the balance of any negotiation, whether or not a single barrel is ever withheld.

For Ottawa, the strategic asset may be the dependence itself, left intact and understood on both sides. A reliable supplier that could disrupt but chooses not to holds a subtler kind of power than one that lashes out and teaches its best customer to leave. In a dispute defined by tariffs and threats, that restraint looks less like weakness than like a bet on the durability of leverage that does not need to be spent to be felt.