U.S. Steel Owner Backed Trump’s Tariffs—Now Canadian Steelworkers Are Challenging Up to 500 Layoffs

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A fight over hundreds of Canadian steel jobs is turning into something larger than a conventional layoff dispute. Stelco’s U.S.-based owner, Cleveland-Cliffs, plans to indefinitely idle cold-rolled and coated operations at Hamilton Works, with as many as 500 employees potentially affected across Hamilton and Lake Erie Works in Nanticoke. The company points to tariffs, weaker demand and persistent import competition.

The United Steelworkers sees a much more complicated story. Cleveland-Cliffs’ chief executive has been an enthusiastic supporter of the Trump administration’s steel tariffs, while the company made binding employment commitments when Ottawa approved its $3.4-billion acquisition of Stelco in 2024. With union leaders demanding federal enforcement and Prime Minister Mark Carney promising accountability, what began as an operational decision is becoming a test of how much protection Canadian workers actually receive when a foreign takeover comes with promises attached.

The Immediate Shock Is Concentrated in Hamilton

The most visible impact will be at Stelco’s Hamilton Works, where Cleveland-Cliffs plans to indefinitely idle cold-rolled and coated steel operations beginning around October 9. United Steelworkers Local 1005 expects roughly 350 of its Hamilton members to be laid off, while the union says another approximately 40 layoffs are expected at Lake Erie Works in Nanticoke. Stelco has used the broader figure of up to 500 affected employees across its operations. For workers, the distinction between an indefinite layoff and a permanent job loss offers limited comfort when there is no clear date for operations to restart.

The affected part of Hamilton Works performs important finishing steps that turn steel into products suitable for customers including manufacturers and other industrial users. Stelco has said its ability to supply hot-rolled steel will continue, and Cleveland-Cliffs maintains that the changes will alter its product mix rather than reduce its overall Canadian steel tonnage. That makes this more complicated than the closure of an entire mill. Production is being reorganized and concentrated, but hundreds of workers who built their lives around the Hamilton operation may still lose their regular jobs. Local 1005 President Ron Wells has described the atmosphere among workers as one of uncertainty, particularly because no one can say how long the idling will last.

Stelco Says Its Market Has Shrunk Dramatically

Cleveland-Cliffs and Stelco argue that the economics of selling Canadian finished steel have deteriorated sharply. According to information the company provided to employees, demand for Stelco’s cold-rolled and galvanized products in its traditional markets had fallen by roughly 25 per cent compared with the 2024 quarterly average, while Canadian demand was down about 10 per cent. The company says U.S. tariffs have sharply restricted an important export market at the same time that imported steel continues to compete for customers inside Canada.

The tariff wall is substantial. President Donald Trump increased Section 232 tariffs on most imported steel and aluminum from 25 per cent to 50 per cent effective June 4, 2025. For a deeply integrated industry that had spent decades moving material across the Canada-U.S. border, a 50 per cent levy can fundamentally change where an order gets filled. Ottawa has responded with tariff-rate quotas, additional import measures and Canadian counter-tariffs, but Stelco says imports remain high enough to prevent it from replacing the business lost through the trade conflict. From the company’s perspective, consolidating finishing activity is therefore a survival measure rather than an attempt to abandon the Canadian operation.

The Union Says Cleveland-Cliffs Helped Create the Tariff Problem

That explanation is where the dispute becomes especially contentious. United Steelworkers Locals 1005 and 8782 have accused Cleveland-Cliffs of being “disingenuous and contradictory” because chief executive Lourenco Goncalves has been one of the strongest corporate supporters of tougher U.S. steel protection. Cleveland-Cliffs itself has repeatedly praised the Trump administration’s Section 232 policy, arguing that the 50 per cent tariff protects American steelmakers from unfair imports and supports U.S. manufacturing.

Goncalves went further than simply accepting the policy. He has publicly applauded Trump for raising the steel tariff to 50 per cent and has previously said his “fingerprints” were on the higher rate. Cleveland-Cliffs’ 2025 annual report likewise praised the Trump administration for restoring what the company called the effectiveness of Section 232 by raising tariffs and eliminating exclusions. That history gives the union’s argument unusual force: workers are being told the trade conflict makes layoffs unavoidable even though the parent company viewed the same tariff architecture as beneficial to its American business. The union contends Cleveland-Cliffs cannot champion a policy that restricts Canadian steel exports and then treat the resulting disruption as something entirely outside its control.

Cleveland-Cliffs Made Employment Promises When It Bought Stelco

The dispute would be politically significant even without the takeover agreement, but the terms of Cleveland-Cliffs’ 2024 acquisition put Ottawa directly in the middle. Cleveland-Cliffs agreed to buy Stelco in a transaction valued at approximately C$3.4 billion, bringing about 1,800 additional United Steelworkers members into its workforce. The transaction closed on November 1, 2024 after receiving regulatory approval in Canada.

Federal approval under the Investment Canada Act was not unconditional. The government announced a package of binding undertakings lasting five years. Among them, Cleveland-Cliffs committed to continue employing at least the same number of unionized workers as were employed when the transaction was announced and to retain the vast majority of non-union employees. It also committed to keep Stelco’s head office in Hamilton, honour existing collective agreements, maintain pension and benefit commitments, and make significant capital and research-and-development expenditures. Those commitments matter because they were presented as part of the reason the foreign acquisition met Canada’s “net benefit” requirements. Less than two years after the deal was announced, workers now want Ottawa to determine whether laying off hundreds of employees is compatible with the promises that helped Cleveland-Cliffs secure approval in the first place.

The Legal Question Is Serious—but It Is Not Yet Settled

The United Steelworkers has asked Industry Minister Mélanie Joly for an emergency meeting and an immediate compliance review of Cleveland-Cliffs’ Investment Canada Act commitments. Prime Minister Mark Carney has gone further publicly, saying the company has legal employment obligations and that Ottawa intends to use its powers to enforce them. The union therefore has more than a political complaint: there is a formal regulatory framework through which the government can investigate whether an investor is respecting promises made as a condition of an acquisition.

That does not mean a violation has already been legally established. Experts examining the takeover have pointed out that the complete wording of Cleveland-Cliffs’ undertakings is not public, and the precise terms could affect whether economic or trade disruptions excuse some degree of non-compliance. Under the Investment Canada Act, the minister can demand that an investor remedy or justify suspected non-compliance. If the issue remains unresolved, the government can seek a superior-court order. Courts have broad powers that can include ordering compliance, imposing financial penalties and, in extreme circumstances, ordering divestiture. The immediate battle is therefore likely to revolve around what Cleveland-Cliffs actually promised, what exceptions were included and whether the current trade situation legitimately activates them.

Cleveland-Cliffs Says the Trade War Changed the Deal It Thought It Was Buying

Goncalves has defended the company’s position by arguing that the commercial environment underlying the Stelco purchase has fundamentally changed. He told CBC that Cleveland-Cliffs acquired Stelco when Canadian steel could move much more freely into the United States and that the current Canada-U.S. trade relationship was not what the company anticipated. In his view, the ability to access U.S. customers was an underlying condition of the acquisition, and Cleveland-Cliffs has the legal right to adjust operations when that market changes dramatically.

The company also rejects the idea that it is simply pulling production out of Canada. Cleveland-Cliffs says total Canadian steel tonnage is expected to remain essentially unchanged, with production consolidated differently between Hamilton and Lake Erie Works. It has said a significant number of affected Hamilton employees could be offered positions in Nanticoke. The union is far less convinced that transfers will solve the problem, particularly when relocating work can impose major commuting or family costs and does not necessarily preserve the same jobs at the same plant. The disagreement illustrates the legal and practical divide: a corporation may measure compliance through overall employment and production numbers, while workers experience a layoff plant by plant and household by household.

Cleveland-Cliffs’ Own Earlier Outlook Adds Another Layer to the Dispute

The timing also raises questions because Cleveland-Cliffs had sounded considerably more optimistic about Canadian market conditions earlier in 2026. In company filings, it said Canada’s tariff-rate quotas were restoring more rational steel pricing and creating improved conditions at Stelco. During the first half of 2026, Cleveland-Cliffs also reported that Canadian steel imports were running below historical levels and said it expected the measures to support a healthier industry and improved Stelco margins through 2026 and beyond.

That does not prove the layoffs are unjustified; steel markets can change quickly, and Cleveland-Cliffs has consistently warned about excess global capacity, imports and volatile demand. But the shift in tone is significant. Earlier statements emphasized improving conditions created by Canadian trade protections. By late September, the company was describing the market for cold-rolled and coated products as challenging enough to require indefinite idling. Union officials are likely to scrutinize that change as they press Ottawa for a compliance review. The key question will not simply be whether Stelco faces genuine market pressure—it clearly does—but whether the severity of that pressure justifies a decision that appears to conflict with employment commitments made less than two years earlier.

Stelco’s Problems Reflect Canada’s Heavy Dependence on U.S. Steel Demand

The stakes extend well beyond one company. Statistics Canada estimates that in 2024, U.S. demand supported roughly 67 per cent of payroll jobs in Canada’s iron and steel mills and ferro-alloy manufacturing industry—about 9,800 jobs. It also calculated that approximately $3.4 billion of industry value added was linked to American demand. By the end of 2025, Canadian exports of unwrought iron, steel and ferro-alloys to the United States had fallen 20.2 per cent compared with 2024. Those figures help explain why tariffs imposed in Washington can quickly become employment problems in Ontario.

The Canadian Steel Producers Association says the domestic steel industry directly employs roughly 23,000 people and supports another 100,000 jobs indirectly. Steel also feeds automotive manufacturing, construction, infrastructure, energy and other industrial supply chains, meaning lost output can spread through communities well beyond a mill gate. The Stelco cuts are occurring after other major disruptions in Ontario’s steel industry, including large job reductions at Algoma Steel and the closure of ArcelorMittal’s Hamilton wire-drawing operation. The pattern underscores a difficult reality: Canada can protect its domestic market more aggressively, but replacing millions of tonnes of historically U.S.-bound demand cannot happen overnight.

What Ottawa Does Next Could Set a Precedent for Future Foreign Takeovers

Canada has already tightened steel import controls, expanded tariff-rate quotas, introduced Buy Canadian procurement measures and made billions of dollars in financing and industrial support available to businesses affected by the trade fight. The United Steelworkers wants the government to go further by strengthening worker-retention support, tightening steel import protections and attaching firm Canadian employment and production conditions to public assistance. In the Stelco case specifically, its immediate demand is simpler: examine Cleveland-Cliffs’ takeover promises and enforce them if they have been breached.

That makes the next stage important well beyond Hamilton. When Ottawa approves a foreign acquisition in exchange for job, investment or production commitments, workers and communities reasonably expect those promises to mean something when economic conditions become difficult. Cleveland-Cliffs will argue that extraordinary trade disruption changed the commercial assumptions behind its acquisition. Steelworkers will argue that protection during difficult periods is precisely why legally binding commitments were required in the first place. With Hamilton finishing operations scheduled to wind down around October 9, that argument is no longer theoretical. The federal response will help determine whether takeover undertakings function as enforceable safeguards—or become promises that weaken when workers need them most.

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