Canadian executives are confronting an unsettling new reality after trade negotiations with Washington collapsed at the eleventh hour, dashing hopes that months of uncertainty might finally come to an end. President Donald Trump’s threatened 50 per cent tariffs on roughly US$20-billion worth of Canadian goods exports came into force at 12:01 a.m. on Saturday, with both nations trading blame for the failure to secure a deal.
Speaking at a Saturday morning press conference, Prime Minister Mark Carney warned that the Canada-US trade relationship faces an “existential threat,” arguing that the cumulative weight of American demands had laid bare the limits of Washington’s commitment to a genuine economic partnership. When pressed on his combative tone, Carney was blunt.
“You are at war when you get attacked. We got attacked.”
He pledged “dollar-for-dollar” retaliation through levies on American exports to Canada, set to take effect on 8 September.
Ottawa Rejects Deal as “Unsustainable”
The agreement that fell apart would have imposed harsh terms on Canada’s steel sector in particular. According to earlier Globe and Mail reporting, Ottawa would have been required to accept a four-million-tonne quota on steel exports to the United States, alongside a 25 per cent tariff on shipments within that quota, rising to 50 per cent above it. Canada would also have been obliged to remove all of its counter-tariffs on American steel.
Marty Warren, national director for Canada at the United Steelworkers, made clear why that arrangement was untenable. “This isn’t a war as in guns and boots on the ground, but this is an economic war,” he said. “It’s up to our generation to stand up for future generations and not lose control of our sovereignty and our Canadian economy, and that’s what was at risk.”
The new American tariffs will, notably, apply to certain goods covered under the United States-Mexico-Canada Agreement, the continental trade pact that has long underpinned North American commerce. BMO Capital Markets senior economist Robert Kavcic described this as a significant departure from the status quo. “This is a major break from the current tariff environment, where 90%-plus of Canadian exports not targeted by specific levies have continued to move tariff-free under cover of the existing trade agreement,” he wrote in a Saturday research note. “This raises more questions on the usefulness of the existing USMCA.”
Manufacturing and Forestry Bear the Brunt
Trump’s latest salvo lands squarely on Canada’s manufacturing base, an industry already struggling to chart a course through months of on-again, off-again trade tensions. Dennis Darby, chief executive of industry group Canadian Manufacturers and Exporters and a member of Carney’s advisory committee on Canada-US economic relations, suggested the Prime Minister’s language signalled a long fight ahead.
“Our preference is for them to quickly get back to the table, but I don’t think that is going to happen any time soon,” Darby said in an interview. “The bigger problem for us is that in the long run, if this back and forth persists, it erodes the confidence companies have to make investment decisions.” He added: “Not only has it been uncertain, but now it might become even more volatile.”
The forestry sector finds itself caught in the crossfire. Softwood lumber already carries a 10 per cent levy under US Section 232 tariffs on top of cumulative anti-dumping and countervailing duties totalling 35 per cent. With the new 50 per cent tariffs now layered on, billions of dollars’ worth of additional wood and paper products face punishing duties. Derek Nighbor, CEO of the Forest Products Association of Canada, did not mince words. “We’re very disappointed. This is going to be very difficult for our sector.”
Nighbor said he intends to work alongside the federal government on support measures, something Carney has promised Ottawa will deliver. But Darby cautioned that financial assistance, while welcome, is no panacea. It will “help keep people on the payroll, but it is not a long-term solution for sure.”
Small Businesses and Investment Sentiment Take a Hit
The fallout is not confined to heavy industry. Dan Kelly, president of the Canadian Federation of Independent Business, said the impact on smaller firms “will be immediate and significant.” A CFIB survey of 1,833 members conducted in late July found that roughly 40 per cent of respondents expect to be affected, with one-third of those anticipating losses of at least half their revenue.
Even companies outside the directly targeted sectors have reason to worry. RBC Economics noted in a Saturday report that the unpredictability of US tariff policy makes it impossible for businesses to anticipate which industries might be next, and that uncertainty alone is dragging down confidence across all trade-exposed industries.
Canadian business investment had recently begun climbing to its highest level in a decade. Kavcic suggested the latest breakdown could reverse that trajectory. “Although businesses had been showing signs of looking past tariff headlines, this would be the toughest action since the spring of 2025,” he wrote. “On one hand, businesses could again recognize the need to move past the tariff news; on the other, questions about the effectiveness of the USMCA and potential for any lasting trade deal could hit business investment over the longer term.”
Gord Nixon, former CEO of Royal Bank of Canada and currently a director at George Weston Ltd. and BlackRock Inc., described the current moment as the latest confirmation of damage done to the bilateral relationship since Trump launched his global trade war last spring.
“The worst-case scenario is more and more escalation and that’s what hopefully they’re trying to avoid, but whether it’s avoidable or not is a $64,000 question to which I don’t think anyone has the answer because you’re dealing with a very unpredictable side,” Nixon said. “The Prime Minister and Canada are very predictable. We’ve got a brilliant negotiating team and a very strong and rational and logical Prime Minister, but you can’t negotiate with yourself.”
Why it Matters
The collapse of these talks marks more than a diplomatic setback; it represents a fundamental rupture in the framework that has governed North American commerce for decades. By extending tariffs to goods covered under the USMCA, Washington has called into question the very architecture of continental trade, leaving Canadian businesses to navigate not just new duties but a wholesale erosion of predictability. For manufacturers, forestry operators, and small business owners already operating on thin margins, the months ahead will demand difficult choices about pricing, staffing, and capital expenditure. And with Carney’s retaliatory measures set to take effect on 8 September, the trade war shows every sign of escalating rather than easing, carrying profound implications for growth, employment, and the long-term competitiveness of the Canadian economy.
