BY MIRABEL ODETA

WASHINGTON — The United States imposed 50% tariffs on about $20 billion worth of Canadian products early Saturday after last-minute negotiations between the two countries failed to produce an agreement, prompting Canada to announce immediate retaliatory measures and deepening a trade dispute between the two longtime allies.

The new U.S. tariffs affect roughly 5% of Canada’s annual exports to the United States and cover a wide range of products, including items such as hockey equipment, medical supplies and other manufactured goods.

Canadian Prime Minister Mark Carney said Canada would respond with tariffs of its own, matching the U.S. measures dollar for dollar in an effort to shield Canadian businesses and workers from the impact of the new duties.

The escalation threatens to further strain economic ties between the neighboring countries and could complicate efforts to maintain the North American trade framework linking the United States, Canada and Mexico.

The breakdown came after several days of negotiations in which officials from both countries had appeared increasingly optimistic that they could reach a compromise. The talks ultimately collapsed over Canadian demands for exemptions and concessions involving several major industries.

Canada had sought changes to U.S. tariffs affecting Canadian steel, aluminum, automobiles and lumber. U.S. officials said the Canadian government also sought changes to other provisions that had already been discussed during negotiations.

Carney said the final U.S. proposals contained last-minute changes that Canada considered unacceptable. He said the terms were economically damaging and raised concerns about whether Washington could be relied upon to honor a future agreement.

Canada’s negotiating team was instructed to return to Ottawa after the talks were suspended.

U.S. officials, meanwhile, argued that Washington had offered Canada favorable treatment compared with other major exporters and said Canadian negotiators introduced new demands that disrupted the tentative understanding reached earlier in the week.

The dispute represents a significant deterioration in a relationship that has historically been characterized by close economic, political and military cooperation.

The United States and Canada exchanged roughly $880 billion in goods and services last year, making their economic relationship one of the world’s largest. Their highly integrated supply chains mean that goods and components frequently cross the border multiple times before reaching consumers.

The two countries also share a border stretching more than 5,500 miles, one of the world’s longest international boundaries. Millions of people and large volumes of commercial traffic cross between the countries each year.

For decades, the United States and Canada have managed to resolve disagreements over issues including lumber, dairy products, automobiles and other industries while maintaining a broader strategic partnership.

The latest dispute is different in both tone and scale.

President Donald Trump has repeatedly criticized Canada’s trade relationship with the United States and has promoted tariffs as a tool for encouraging companies to manufacture more goods in the United States.

Trump has also repeatedly suggested that Canada could become the 51st U.S. state, comments that have angered Canadian political leaders and the public.

Carney has acknowledged that the relationship between the two countries has changed and said Canada should not expect a return to the way the partnership operated in the past.

The economic consequences could extend beyond the businesses directly affected by the tariffs.

Canadian exporters facing higher costs could reduce production, delay investments or seek alternative markets. U.S. companies importing Canadian goods would initially be responsible for paying the tariffs and could pass some of those costs on to consumers through higher prices.

Business groups on both sides of the border have warned that increased trade barriers could disrupt supply chains, increase operating costs and discourage investment.

Canadian business leaders have described the tariffs as a major threat to North American competitiveness, particularly for smaller companies that have fewer options for finding alternative suppliers or customers.

The United States also has an incentive to avoid prolonged disruption. American manufacturers and consumers rely heavily on Canadian raw materials, energy products, industrial components and other goods.

Canada is particularly dependent on the U.S. market. Nearly three-quarters of Canada’s merchandise exports were sent to the United States last year, making the American market critical to Canadian producers.

The dispute comes as both countries face broader economic and political pressures.

Trump has made tariffs a central part of his economic agenda, arguing that import taxes can encourage domestic manufacturing and protect American industries. His administration has sought several different legal authorities to impose tariffs after questions arose over some of the president’s earlier tariff measures.

The latest Canadian tariffs were imposed under a rarely used provision of U.S. trade law dating to 1930. The provision allows the president to impose tariffs of up to 50% on goods from countries determined to have discriminated against American businesses.

The law was created during an era of severe economic turmoil and is associated with the broader protectionist policies of the early 1930s. Economists and historians have long debated the extent to which those policies contributed to the worsening of the Great Depression, but the period remains a cautionary example of the potential consequences of escalating trade barriers.

The dispute also creates uncertainty for the future of the United States-Mexico-Canada Agreement, the North American trade pact that replaced the earlier North American Free Trade Agreement during Trump’s first term.

The three countries are preparing for negotiations over the future of the agreement. Formal discussions between Washington and Mexico have already begun, while negotiations with Canada have yet to get underway.

The latest confrontation could make those discussions more difficult.

Canadian officials had warned that new U.S. tariffs would lead to retaliation and could force Ottawa to suspend negotiations. U.S. officials, meanwhile, had indicated that Washington would strongly oppose retaliatory measures.

With both governments now having publicly committed to their positions, pressure is building for a solution that can prevent the dispute from expanding into a much broader trade war.

Canada’s government said it expects to announce additional measures to support workers and businesses affected by the tariffs.

The immediate challenge for both countries will be limiting the economic damage while finding a way back to negotiations.

The dispute has already demonstrated how quickly a disagreement over individual industries can become a broader confrontation involving the future of one of the world’s most important trading relationships.

For businesses operating on both sides of the border, the uncertainty may prove nearly as damaging as the tariffs themselves. Companies will now have to determine how long the new duties could remain in place, whether additional products could be targeted and whether the two governments can eventually reach a new agreement.

The failure of the latest negotiations leaves the two countries facing a difficult choice: continue escalating retaliatory measures or return to the negotiating table and attempt to rebuild an agreement that can preserve their deeply integrated economies.

Original article