A major shakeup inside the White House is adding another layer of uncertainty to an already complicated Canada–U.S. trade relationship. President Donald Trump announced on November 6, 2026, that longtime adviser Stephen Miller will replace Susie Wiles as White House chief of staff, effective November 9.
The appointment comes just days after Republicans suffered significant midterm election losses and as Canadian Prime Minister Mark Carney continues pursuing an unfinished trade agreement with Washington. Although recent negotiations have shown signs of progress, significant tariffs remain in place, and several contentious issues have yet to be resolved.
For Canadian manufacturers, exporters, and workers whose livelihoods depend on cross-border commerce, Miller’s promotion raises an important question: whether the White House leadership change will influence the direction of negotiations at a particularly sensitive moment.
Trump Makes a Major Leadership Change After Midterm Election Losses
Trump announced the appointment on Friday, November 6, confirming that Miller would become White House chief of staff on Monday, November 9. Miller moves into the position from his role as deputy chief of staff for policy, replacing Susie Wiles, who will transition to Trump’s political operation. Wiles made history as the first woman to serve as White House chief of staff and was credited with bringing greater organizational discipline to the administration. The change comes immediately after Republicans lost control of both chambers of Congress in the midterm elections, creating a significantly different political environment for the administration.
The chief of staff is one of Washington’s most influential unelected positions, responsible for coordinating White House operations, managing access to the president, and helping determine which policy decisions receive priority. Wiles was generally regarded as an experienced political manager, while Miller has developed a reputation as an aggressive advocate of Trump’s policy agenda. Their different approaches have attracted attention from political observers and international partners alike. For Ottawa, the appointment matters because difficult trade negotiations often require decisions from the president himself, making the organization and priorities of his closest advisers particularly important.
Stephen Miller Brings a Hard-Line Policy Record to His New Position
Miller, 41, has been associated with Trump since the 2016 presidential campaign and has become one of the administration’s most influential domestic policy advisers. He is particularly well known for helping design Trump’s restrictive immigration agenda, including efforts to increase deportations and immigration enforcement. Reuters reported that Miller pushed for a target of 3,000 immigration arrests per day during Trump’s second administration. His responsibilities have also extended into federal workforce restructuring and other contentious domestic policy initiatives, establishing a reputation for pursuing presidential priorities forcefully rather than seeking broad political compromise.
His elevation to chief of staff gives him a larger role in coordinating the administration’s agenda at a time when trade disputes, immigration enforcement, and congressional investigations are competing for attention. Supporters view Miller as a capable administrator who understands Trump’s priorities and can translate them into government action. Critics consider his appointment a sign that the White House intends to maintain a confrontational approach despite Republican election losses. However, Miller’s previous policy record does not establish how he will handle negotiations with Canada. No specific change to American trade demands was announced alongside his promotion, leaving its implications for Ottawa uncertain.
Canada–U.S. Negotiations Had Started Making Progress Before the Appointment
Just days before the White House leadership announcement, Trump expressed optimism about reaching a new trade agreement with Canada. Following discussions with Carney over the weekend, Trump said on November 3 that the countries were approaching a deal. Carney offered a more cautious assessment while attending a Commonwealth meeting in Antigua and Barbuda, acknowledging meaningful progress while emphasizing that important issues remained unresolved. He also indicated that Washington had withdrawn some earlier negotiating demands, including a proposal that would have given the United States substantial influence over Canada’s future trade agreements with other countries.
The improvement represented a meaningful development after months of economic confrontation. Nevertheless, the difference between encouraging discussions and a finalized agreement remains considerable. Governments must settle tariff reductions, exemptions, implementation schedules, and other conditions before businesses can reliably plan around new rules. Carney has indicated that negotiations will continue over the coming weeks, with Canadian officials seeking an arrangement that protects national interests and provides economic stability. For companies negotiating supply contracts or considering new investments, political optimism offers limited reassurance without clearly defined commitments. Miller’s appointment introduces another variable into that process, although it does not necessarily mean the negotiations will become more difficult.
Canada’s Earlier Decision to Suspend Talks Revealed Deep Political Disagreements
The current negotiations follow a significant breakdown in August, when Canada suspended formal discussions with Washington after rejecting proposed American conditions. Canada’s Department of Finance explained that the terms being demanded would have undermined Canadian economic interests, strategic industries, and national sovereignty. Carney subsequently highlighted concerns involving French-language protections, Canadian cultural policies, and the country’s independence to negotiate trade agreements with other nations. These disputes extended beyond conventional disagreements about tariff rates and involved fundamental questions about how much control Canada should retain over its domestic and international economic decisions.
The breakdown was followed by additional American tariffs and Canadian countermeasures, increasing pressure on businesses operating across the border. More recently, Carney has suggested that Washington has backed away from some of the demands Ottawa considered unacceptable, helping explain the renewed optimism. However, Canadian officials have not publicly identified every remaining obstacle, making it difficult to determine how close the countries are to a comprehensive agreement. Ottawa faces a delicate calculation: accepting some concessions could provide immediate relief for affected industries, while agreeing to broader restrictions might create economic and political consequences that last much longer. Any final arrangement will therefore be judged on more than its headline tariff reductions.
CUSMA Remains in Force Despite Washington’s Decision Not to Renew It
Another critical issue is the future of the Canada–United States–Mexico Agreement, known as CUSMA in Canada and USMCA in the United States. The agreement entered into force on July 1, 2020, replacing NAFTA and establishing the modern framework for North American trade. During its scheduled six-year review on July 1, 2026, the United States declined to renew the agreement in its existing form. However, that decision did not immediately terminate CUSMA. Under its provisions, the agreement remains in force, with annual reviews continuing unless the three countries agree to an extension. Without renewal, its scheduled expiration remains July 2036.
This distinction is particularly important for manufacturers and exporters trying to understand the legal environment. CUSMA continues governing major aspects of continental trade, including rules of origin, labour commitments, and dispute-resolution procedures. Nevertheless, the agreement does not automatically shield every Canadian product from additional American tariffs imposed under separate trade laws. Certain U.S. duties specifically apply even to goods that would otherwise qualify for preferential treatment under CUSMA. Consequently, the immediate bilateral tariff negotiations and the broader future of the North American trade agreement are related but distinct challenges. Miller’s appointment does not change the agreement’s legal status, although future White House decisions could influence how aggressively Washington approaches subsequent reviews.
Existing Tariffs Continue to Put Pressure on Canadian Manufacturers
The financial consequences of the trade dispute are already substantial. Canada’s federal government reported that the United States imposed 50% tariffs on approximately C$27.6 billion worth of Canadian goods beginning August 22, 2026. Ottawa responded by introducing matching countermeasures on selected American imports, with tariff rates of 15%, 25%, and 50% taking effect September 8. The measures affect numerous product categories and operate alongside separate American tariffs on industries such as steel, aluminum, and automobiles. U.S. customs guidance also confirms that certain additional duties apply independently of normal CUSMA preferential treatment.
For businesses, tariffs translate into real decisions about pricing, production, and employment. A Canadian manufacturer supplying American customers may have to absorb higher border costs, increase selling prices, or accept fewer orders. Companies operating on relatively small margins can find these choices particularly difficult, especially when competitors have access to cheaper production locations. Ottawa has introduced financial assistance and other measures to support affected industries, but government assistance cannot entirely eliminate the uncertainty created by shifting trade restrictions. An eventual agreement could provide meaningful relief, particularly if tariff reductions cover a broad range of goods. Until the final terms are established, manufacturers must continue making decisions around the duties currently in effect.
Canada’s Auto Industry Faces a Particularly Important January Deadline
The automotive industry is among the most exposed sectors because vehicle manufacturing depends on closely integrated North American supply chains. Federal government figures indicate that more than 90% of Canadian-made vehicles and approximately 60% of Canadian-made automotive parts are exported to the United States. Canada’s auto industry supports approximately 125,000 direct jobs, with considerably more employment connected to suppliers and related activities. Since April 2025, Canadian-built vehicles have faced a 25% American tariff on their non-U.S. content, although qualifying U.S. content is exempt under CUSMA rules.
The uncertainty could intensify in the coming months. In August, Trump threatened to increase tariffs on Canadian automobiles, trucks, and automotive parts to 50% beginning January 1, 2027. That threatened increase has not yet taken effect, and negotiations could change the outcome. Nevertheless, manufacturers cannot wait until the final days of December to make decisions involving staffing, production schedules, and capital investment. An Ontario parts supplier considering a new equipment purchase must weigh the possibility of higher export costs against future customer demand. American vehicle manufacturers also depend on Canadian components, meaning prolonged disruption could create additional expenses on both sides of the border. Any agreement that fails to address automotive tariffs would leave a major source of economic uncertainty unresolved.
Smaller Canadian Manufacturers Are Already Considering Moving Production
The pressure extends beyond major automakers and metal producers. Reuters reported on November 5 that Cabico, a Canadian kitchen-cabinet manufacturer operating facilities in Quebec and Ontario, had experienced a 25% decline in shipments to the United States compared with 2024 levels. Before the escalation of tariffs, approximately 90% of the company’s production was shipped to American customers. Cabico has since laid off more than one-quarter of its roughly 700 employees. Its founder, Alain Ouzilleau, has begun considering the possibility of arranging production in the United States, an option he had previously been reluctant to pursue.
The company’s experience illustrates how trade barriers can alter investment decisions for businesses that have spent decades developing manufacturing operations in Canada. American tariffs on Canadian kitchen cabinets are scheduled to increase from 25% to 50% in January 2027, creating additional uncertainty about future orders. Canada has also introduced temporary protective measures on certain imported cabinets while reviewing competitive pressures in the domestic market. However, those measures do not resolve Canadian producers’ difficulties accessing American customers. For employees, the consequences can involve reduced working hours, layoffs, and uncertainty about the future of their communities. For business owners, the challenge is deciding whether maintaining Canadian production remains financially sustainable under increasingly unpredictable trade conditions.
Canada’s Latest Trade Figures Show Why a Deal Remains Economically Important
Recent Statistics Canada data demonstrate that the economy continues to experience uneven trade performance. On November 4, the agency reported that Canada’s merchandise trade surplus reached C$5.4 billion in September, increasing from C$5.0 billion in August. However, stronger energy and precious-metals exports accounted for much of the improvement. When energy and metal and non-metallic mineral products were excluded, Canadian exports declined 5.6% during the month. Overall export volumes fell 4%, while exports of motor vehicles and parts decreased 4.9%. These figures suggest that the headline trade surplus masks weaknesses in several important industries.
Canada’s dependence on American demand explains why the outcome of negotiations matters so much. Statistics Canada reported that 71.7% of Canadian merchandise exports went to the United States in 2025, compared with 75.9% in 2024. Although exports to other markets increased, replacing established American customers is not straightforward for businesses built around continental supply chains. Overseas expansion often requires different distribution networks, product standards, and substantial additional investment. The latest figures do not establish that Miller’s appointment will affect Canadian exports, but they show why prolonged trade uncertainty remains a significant economic concern. A dependable agreement could give businesses greater confidence to invest, hire, and maintain production in Canada.
Democratic Control of Congress Creates Another Complication for Trump’s Trade Strategy
The incoming Congress could play an important role in shaping the political environment surrounding the negotiations. Democrats won control of both chambers in the November 3 midterm elections and are preparing to increase their oversight of the administration when the new Congress takes office in January. Carney welcomed Democratic efforts to repeal American tariffs on Canadian goods, arguing that restoring freer trade would benefit households and workers. Senator Ron Wyden, who is positioned to lead the Senate Finance Committee, has identified Canadian tariffs as an early target, while Senate Democratic leader Chuck Schumer introduced legislation in September seeking to eliminate tariffs imposed by Trump.
However, congressional opposition does not guarantee that the tariffs will disappear. Trump retains substantial authority over trade policy and could veto legislation attempting to reverse his measures, requiring considerable bipartisan support to override him. Miller will assume his new responsibilities on November 9 amid these political tensions, while Canada continues negotiating tariff relief and businesses prepare for possible January increases. His appointment strengthens the influence of one of Trump’s most trusted advisers, but its effect on bilateral trade remains uncertain. The decisive development will be whether Ottawa and Washington can convert improving diplomatic relations into a written agreement with clear protections for businesses and workers. Until that happens, the economic uncertainty surrounding the Canada–U.S. relationship will remain unresolved.
