U.S. Ambassador Pete Hoekstra recently disclosed that former Canadian Prime Minister Mark Carney offered to double oil exports to the United States during October 2025 trade talks. This proposal sought to mitigate tariffs on Canadian goods but collapsed following an anti-tariff advertisement from Ontario.

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The 4-million-barrel gambit to stop U.S. tariffs

During negotiations in October 2025, former Canadian Prime Minister Mark Carney proposed increasing oil shipments to the United States by three to four million barrels per day. According to U.S. Ambassador Pete Hoekstra, this move would have nearly doubled the existing export levels between the two nations. The offer was designed as a strategic lever to persuade President Donald Trump to reduce or eliminate tariffs on Canadian automobiles, aluminum, and steel.

The proposal initially found strong allies within the U.S. administration. Ambassador Pete Hoekstra noted that Energy Secretary Chris Wright and Interior Secretary Doug Burgum were both enthusiastic about the prospect of securing a larger volume of Canadian oil. However, the momentum shifted when President Donald Trump personally intervened, advising his team to exercise restraint and reminding them that the United States possessed other energy options.

How an Ontario advertisement derailed Mark Carney's negotiations

The trade discussions ultimately collapsed not because of the oil figures, but due to a provincial communications blunder. As reported by the source, the negotiations ended abruptly after the province of Ontario aired an advertisement criticizing U.S. tariffs.. This public display of defiance prompted President Donald Trump to walk away from the talks entirely.

The fallout from the advertisement extended beyond the policy level to personal diplomatic friction... Ambassador Pete Hoekstra, who is known for a confrontational diplomatic style , reportedly swore at David Paterson, the Washington representative for Ontario, over the ad. While discussions between Canada and the U.S. resumed this spring, they have yet to yield any visible progress.

The South Bow-Bridger pipeline and the 2027 investment deadline

Despite the failed trade talks, there remains a path for expanded energy infrastructure. Ambassador Pete Hoekstra expressed optimism regarding the South Bow-Bridger cross-border pipeline, a project that President Donald Trump permitted in April. This pipeline is designed to move 550,000 barrels of oil per day, though it still requires various state-level approvals before construction can begin.

The project is currently awaiting a final investment decision, which South Bow expects to reach by mid-2027. Ambassador Pete Hoekstra highlighted Alberta and Saskatchewan as the most reliable and geographically advantageous sources for these expanded shipments, suggesting that the physical infrastructure remains a key pillar of the bilateral relationship regardless of tariff disputes.

Canada's two-thirds share of U.S. imports and the trade deficit

The tension over tariffs is inextricably linked to the sheer volume of energy Canada provides to its southern neighbor. Canada currently serves as the largest crude oil supplier to the United States, providing approximately two-thirds of all American crude imports. This deep integration creates a strategic dependency that provides Canada with leverage, but also creates a point of contention for U.S. leadership.

President Donald Trump has frequently pointed to the significant goods trade deficit that Washington maintains with Ottawa, a deficit fueled in part by these massive energy flows. This economic imbalance often serves as the primary justification for the U.S. administration's willingness to impose tariffs on other Canadian sectors, such as the automotive and metals industries.

The missing perspective from David Paterson and Ontario

While Ambassador Pete Hoekstra has provided a detailed account of the collapse, several critical pieces of the puzzle remain missing. The source relies entirely on the U.S. perspective, leaving the views of David Paterson and the Ontario government unaddresssed. It remains unclear whether Ontario coordinated the anti-tariff advertisement with the federal government or if the move was a rogue provincial action that undermined Mark Carney's diplomacy.

Furthermore, there is no confirmation from the Canadian side regarding the exact terms of the oil offer or whether the proposed increase of three to four million barrels per day was logistically feasible given current pipeline capacities. Without a statement from the former Prime Minister's office or the Ontario representative , the narrative remains a one-sided account of a diplomatic failure.