Trump singles out Canada's dairy system as tariff justification

Canadian officials say supply management not open to negotiation

Canada’s dairy supply management system is at the center of the trade dispute between the United States and Canada. President Donald Trump cited the system as one of three “main irritants” justifying the 50% tariff he signed on July 20 covering $20 billion in Canadian goods, set to take effect in August. The tariff order argues the system is “unreasonable” to American farmers seeking to sell north of the border.

The system, established in the early 1970s, sets production quotas and prices through provincial marketing boards, giving dairy farmers a predictable income while maintaining a consistent domestic supply. Foreign dairy can enter Canada tariff-free only within set quota limits; above those limits, levies range from 200% to nearly 300%, limiting foreign competition.

American farmers have long demanded greater access, particularly as U.S. dairy production reaches record highs that outpace domestic demand. The U.S. currently has tariff-free access to 3.5% of Canada’s dairy market, despite Canada being one of the top importers of U.S. dairy — buying $1.3 billion worth in 2025, according to USDA data.

Canadian officials have said dairy is not open to negotiation. Quebec Premier Christine Fréchette said supply management is non-negotiable. U.S.-Canada Trade Minister Dominic LeBlanc called the system “a cornerstone of Canada’s economy and our rural communities” that “ensures that Canadians have access to high-quality dairy products made by Canadian dairy farmers.”

David Clement, a policy director at the Consumer Choice Center, told the BBC the dairy industry is “the most powerful political lobby in the country that stretches across all of the major political parties.” Farmers have staged protests with tractors and cattle on Parliament Hill when faced with possible trade concessions.

Supply management has faced criticism beyond the Trump administration. The previous Biden administration twice challenged Canada’s dairy quota practices under the USMCA. In 2024, the UK walked away from trade talks over tariff-free access for British cheese. The OECD has argued the system distorts production and trade. Some Canadian commentators have called for its dismantling; Calgary writer Jen Gerson described it as “anachronistic” and blamed it for driving up food prices.

Statistics Canada and USDA data from May show Canadians paid an average of C$3.19 ($2.26) per liter of milk, while Americans paid C$1.95. Clement argued that eliminating supply management would save Canadians money and increase choice. However, polling suggests about 77% of Canadians support keeping the system in place, citing the desire to protect local farmers and access to high-quality products.

David Wiens, president of the Dairy Farmers of Canada and a third-generation farmer from Manitoba, said the system contributes to price stability and protects “food sovereignty.” He noted that U.S. egg prices spiked after a bird flu outbreak, arguing that supply management shields Canadians from similar volatility.

Ryan Cardwell, a professor at the University of Manitoba who has studied the political support for supply management, said the policy is likely “not going anywhere.” Reforming it would require a multi-billion-dollar compensation package for farmers and risk losing the governing Liberals seats in Parliament. Cardwell said that while some countries have transitioned away — Australia used a temporary milk levy on consumers, and the EU gradually increased quotas before abolishing them in 2015 — the political costs in Canada remain prohibitive.