G20 Trade Talks End Without Deal as Canada-U.S. Tariff Fight Hangs Over Milwaukee Summit

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The G20 trade ministers’ meeting in Milwaukee ended with a reminder of how difficult the global trade environment has become. Ministers found common ground on one narrow issue—opposing the coercive use of food trade—but failed to reach broader consensus on industrial overcapacity and forced labour in supply chains. For Canada, the meeting carried an additional layer of urgency. Ottawa arrived while locked in an escalating tariff dispute with Washington, its largest trading partner, and left without a bilateral breakthrough. Canadian International Trade Minister Maninder Sidhu and U.S. Trade Representative Jamieson Greer did speak on the sidelines, but major differences remain. With additional U.S. auto tariffs threatened for January and the future of CUSMA still under review, Milwaukee became less a finish line than another checkpoint in a much larger trade confrontation.

Milwaukee Produced a Narrow Agreement, Not a Broad Trade Breakthrough

The United States entered the two-day ministerial with four priorities: combating the coercive use of food trade, addressing structural excess production, reconsidering parts of the World Trade Organization’s most-favoured-nation framework, and eliminating forced labour from global supply chains. By the close of the meeting on October 1, ministers had managed consensus on the food issue, but not on statements covering excess industrial capacity or forced labour. That distinction matters because the Milwaukee gathering did not end in complete failure; it produced limited agreement while leaving the most contentious economic questions unresolved.

The lack of broader consensus also showed how differently G20 members view the tools available for dealing with trade distortions. Washington has increasingly relied on tariffs and country-specific pressure, while other governments continue to emphasize multilateral rules or more narrowly targeted trade remedies. Greer argued that existing institutions have been too slow to respond to problems such as subsidized overproduction. Other countries agreed that excess capacity is a problem but did not agree on a single G20 response. The result was a summit that exposed shared concerns without producing a common playbook.

Canada and the U.S. Talked, but the Main Sticking Points Remained

Sidhu and Greer held an informal pull-aside discussion during the Milwaukee meetings, with Canada raising bilateral trade concerns as well as World Trade Organization reform. The encounter mattered because formal Canada-U.S. negotiations are led on the Canadian side by Canada-U.S. Trade Minister Dominic LeBlanc, while Sidhu’s portfolio is focused more broadly on international trade. Greer said technical discussions with Canada are continuing and described the unresolved issues as “quite difficult to resolve.” He also said the Trump administration remained open to a deal but was not inclined to eliminate tariffs entirely.

That left Canada balancing two objectives at a gathering intended to promote international cooperation. Ottawa was simultaneously trying to stabilize its most important trading relationship and use the G20 sidelines to deepen ties elsewhere. Sidhu held or scheduled meetings with counterparts from the European Union, India, Brazil, France, Australia and Turkey. Canadian officials emphasized predictable, rules-based trade, while Washington continued to stress reshoring and reciprocal treatment. Milwaukee therefore became two negotiations at once: a multilateral conversation about the global trading system and a much more immediate bilateral effort to prevent Canada-U.S. tensions from escalating further.

The Tariff Fight Had Already Escalated Before Delegates Arrived

The dispute was already far beyond rhetoric by the time ministers gathered in Wisconsin. The Canadian government says the United States imposed 50% tariffs on C$27.6 billion worth of Canadian goods effective August 22. Ottawa responded by matching the measures dollar for dollar, imposing tariffs of 15%, 25% and 50% on C$27.6 billion in U.S. imports beginning September 8. The Canadian countermeasures target sectors including steel and aluminum, dairy, appliances, agricultural equipment, pulp and paper, plastics and electronics.

Washington then tightened restrictions further. On September 29, a U.S. ban took effect on nearly US$1 billion worth of selected Canadian imports, including certain alcoholic beverages, dairy products and motorcycles. The U.S. government says the measures respond to what it considers discriminatory Canadian treatment of American exports. Ottawa has rejected that characterization and says its countermeasures are a response to U.S. tariffs. Those competing explanations are important because they show why a quick settlement has been difficult: both governments describe their own measures as reactions to the other side, creating a cycle in which each new restriction becomes justification for another.

Autos Carry Some of Canada’s Largest Immediate Exposure

The automotive sector is where the dispute could become significantly more disruptive. President Donald Trump has threatened to raise tariffs on Canadian cars, trucks and auto parts to 50% starting January 1, 2027. Greer did not rule out that possibility in Milwaukee. Canada’s exposure is unusually high because its auto industry was built around an integrated North American supply chain rather than a stand-alone domestic market. More than 90% of Canadian-made vehicles and about 60% of Canadian-made auto parts are exported to the United States.

The employment stakes are substantial. The federal government says Canada’s auto sector directly supports about 125,000 jobs and more than 500,000 workers when broader employment supported by the industry is included. Canadian plants produced more than 1.2 million passenger vehicles in 2025. Parts, engines and finished vehicles can cross the border multiple times during production, which means tariffs can affect companies and workers on both sides rather than landing neatly on one country. Manufacturers such as GM, Ford, Stellantis, Toyota and Honda all operate within this interconnected system. That is why even a tariff announced for a future date can influence investment decisions long before it formally takes effect.

Steelworkers and Small Exporters Are Already Feeling the Dispute

The trade fight is no longer an abstract argument measured only in tariff schedules. Stelco said it would idle finishing operations at its Hamilton, Ontario, facility, affecting as many as 500 workers, while concentrating production at its Lake Erie Works in Nanticoke. The company cited market uncertainty, import pressure and damage associated with U.S. tariffs. Operations in Hamilton were expected to begin winding down in October. The move came as Canada’s steel industry was already dealing with weaker demand and a much more defensive North American trade environment.

Smaller exporters are facing a different version of the same problem. Canadian distillers, brewers and winemakers lost access to parts of the U.S. market when the new import ban took effect. Reuters highlighted Saskatchewan distiller John Cote, whose Black Fox operation hoped to replace lost American sales with more business inside Canada. That is not necessarily simple. Alcohol distribution remains heavily shaped by provincial systems, and producers say interprovincial rules can make it difficult to secure shelf space outside their home province. For a small exporter, losing a nearby U.S. customer can therefore be harder to offset than headline trade statistics suggest.

The Scale of Canada-U.S. Trade Raises the Stakes

The scale of Canada-U.S. commerce helps explain why the dispute followed Canadian officials into the G20 meeting. The U.S. Trade Representative estimates that two-way goods and services trade with Canada totalled US$872.3 billion in 2025. Global Affairs Canada calculates the relationship another way and says Canada and the United States exchanged nearly C$3.5 billion in goods and services every day that year. Those figures include everything from crude oil and automobiles to financial, travel and commercial services.

The size of the relationship also makes simple decoupling unrealistic in the near term. U.S. businesses sold roughly US$333.6 billion in goods to Canada in 2025, while importing about US$381.9 billion. Canada, meanwhile, still sends the majority of its merchandise exports south of the border. Energy pipelines, railways, electricity networks and manufacturing supply chains were built over decades around continental trade. Tariffs can change the economics of those flows, but they do not instantly create alternative infrastructure or customers. For businesses making capital investments, the central problem is therefore not only the tariff rate itself; it is uncertainty over whether the rules will change again before those investments pay off.

Canada Is Diversifying, but the U.S. Still Dominates

Ottawa is accelerating efforts to reduce its dependence on the American market, and there is evidence that diversification was already underway before the latest escalation. Global Affairs Canada says Canadian goods and services exports to non-U.S. markets rose 11.1% in 2025, an increase of C$33.3 billion. Non-U.S. destinations accounted for 32.8% of Canadian exports, the highest share in more than four decades. Growth was helped by stronger shipments of commodities such as gold and crude oil as well as gains in trade with Europe and the Indo-Pacific.

Milwaukee provided Canada with another venue to pursue that strategy. Sidhu used the meeting to advance discussions involving the European Union, India and Mercosur, among others. Ottawa has also set a longer-term goal of doubling non-U.S. exports by 2035. Yet diversification should not be confused with replacement. The United States remains Canada’s largest export market by a wide margin, particularly for autos, energy and many manufactured goods. New trade agreements can lower barriers and create opportunities, but building commercial relationships, transportation capacity and customer networks takes years. Canada’s challenge is therefore to broaden its options without assuming the U.S. market can be quickly substituted.

Global Trade Divisions Went Well Beyond the Canada-U.S. Dispute

One of the biggest G20 disagreements involved structural excess capacity—the problem created when production, often supported by state policies or subsidies, grows far beyond domestic demand and spills into export markets. The issue is especially acute in steel. A separate meeting of the OECD-led Global Forum on Steel Excess Capacity in Milwaukee adopted the “Milwaukee Framework,” which calls for stronger monitoring, greater transparency and coordinated action against policies that contribute to chronic overproduction. The OECD estimates global steel excess capacity could rise from 601 million tonnes in 2024 to 745 million tonnes by 2028.

The broader G20 could not translate that concern into a common statement on excess industrial capacity. It also failed to reach consensus on forced-labour language. At the same time, Washington pushed discussion of the WTO’s most-favoured-nation principle, which generally requires members to extend the same tariff treatment granted to one WTO member to others, subject to exceptions such as free-trade agreements and trade remedies. The U.S. argues that the system needs more flexibility to confront non-market practices. Other members have not agreed on how far such reform should go. Milwaukee therefore exposed a deeper dispute about the rules themselves, not just individual tariff rates.

Next Steps Shift to CUSMA Reviews and the Miami Summit

The most important negotiations now move back to bilateral and North American channels. The first six-year CUSMA joint review took place on July 1, 2026, and the United States declined to extend the agreement for another 16-year term in its current form. That does not mean CUSMA has expired. The agreement remains in force until 2036 unless a party withdraws, and when the three countries do not agree on an extension, annual joint reviews continue. Canada has said it wants the agreement renewed, while Washington says outstanding issues must be addressed first.

That process now overlaps with more immediate deadlines. The threatened 50% U.S. tariffs on Canadian vehicles and parts are scheduled for January 1, 2027, unless policy changes before then. Meanwhile, G20 leaders are scheduled to meet in Miami on December 14 and 15. Those dates create several opportunities for negotiations but no guarantee of a settlement. Milwaukee showed that officials are still talking, both bilaterally and through multilateral forums, yet the central disagreements remain unresolved. For Canadian businesses, workers and exporters, the next few months will be shaped less by summit communiqués than by whether those talks produce durable rules before additional trade barriers take effect.

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