Dominic LeBlanc’s third negotiating round in three weeks leaves Canada eight days to head off an unprecedented 50 per cent tariff on nearly US$20 billion of exports, and for the first time CUSMA compliance offers no shelter
By Peacock Tariff Consulting, Canada Trade Desk
OTTAWA, August 12, 2026
Canada’s minister responsible for Canada-United States trade, Dominic LeBlanc, sat down with United States Trade Representative Jamieson Greer in Washington on Tuesday for the third time in three weeks, a compressed diplomatic tempo that reflects how little room Ottawa has left before an unprecedented American tariff action takes effect on August 19.
“Today, we met with the United States Trade Representative, Jamieson Greer. We remain committed at the negotiating table and continue to work diligently to advance and staunchly defend Canadian interests,” LeBlanc wrote in a social media post following the meeting, according to a Reuters report filed from Ottawa on August 11. Canada’s chief trade negotiator, Janice Charette, also attended.
The meeting produced no announced breakthrough. What it did produce was a clearer picture of the stakes. Eight days from now, at 12:01 a.m. Eastern on Wednesday, August 19, an additional 50 per cent ad valorem duty is scheduled to attach to hundreds of tariff lines of Canadian-origin goods entering the United States. The Office of the United States Trade Representative estimates the measure covers close to US$20 billion in annual imports from Canada, roughly 5.2 per cent of the US$383 billion in goods the United States bought from Canada in 2025, based on U.S. Census Bureau figures cited by Reuters.
The number matters less than the mechanism. The duty rests on Section 338 of the Tariff Act of 1930, a provision that has sat unused as a tariff-imposition tool for its entire ninety-six-year life. And unlike every previous Canada-specific tariff action taken by the current administration, it makes no exception for goods that qualify for preferential treatment under the Canada-United States-Mexico Agreement.
For Canadian exporters who spent the past eighteen months rebuilding their compliance programs around CUSMA origin certification as a tariff shield, that single sentence rewrites the risk model.
What Section 338 Actually Does
Section 338 of the Tariff Act of 1930, codified at 19 U.S.C. section 1338, authorizes the President of the United States to impose additional duties of up to 50 per cent ad valorem on the products of any country found to discriminate against United States commerce, or to place unreasonable restrictions on American goods that are not applied equally to the goods of other nations.
The statute is remarkable for what it does not require. There is no predicate investigation by the United States International Trade Commission. There is no Commerce Department injury finding. There is no notice-and-comment rulemaking. A presidential finding and a proclamation are sufficient. In its analysis of the measure, the law firm Holland and Knight noted that the statute “requires only a presidential finding and proclamation, with no prior investigation by the U.S. International Trade Commission (ITC), USTR or U.S. Department of Commerce.”
President Donald Trump signed three separate proclamations under the authority on July 20, 2026. Each addresses a distinct area of alleged Canadian discrimination: motor vehicles, alcoholic beverages, and dairy. Together they impose the additional 50 per cent duty on goods entered for consumption, or withdrawn from warehouse for consumption, on or after the August 19 effective date.
The statute also contains an escalation clause that has drawn considerably less attention than the tariff rate itself. Section 338(b) authorizes the President to move from additional duties to an outright ban on imports from the offending country if the discrimination is maintained or increased. No administration has ever tested that provision, and it is not clear that any court would sustain it. But it sits in the text, and Canadian negotiators are unlikely to have overlooked it.
Because the statutory design ties the duty to the level of discrimination it is meant to offset, resolution of any one of the three underlying grievances could, in principle, trigger a corresponding reduction. That built-in off-ramp is precisely why the thirty-day gap between proclamation and effective date has been read in both capitals as a negotiating window rather than a countdown clock.
The Three Grievances
The proclamations identify specific Canadian measures as the triggering conduct.
The motor vehicle proclamation targets Canada’s 25 per cent surtax on United States-origin motor vehicles. The American position is that the surtax is applied exclusively to vehicles of United States origin and to no other country’s vehicles, which makes it discriminatory within the meaning of Section 338 rather than a generally applicable trade measure. Canada imposed the surtax in 2025 as a countermeasure to American automotive tariffs.
The alcoholic beverage proclamation targets the decision by Canadian provinces and territories, beginning in March 2025, to halt the purchase, distribution, or retail sale of American alcoholic beverages through provincial liquor monopolies while continuing to stock products from other countries. Because provincial liquor boards are the exclusive or dominant wholesale channel in most of the country, delisting American product functions as a near-total market closure. The American argument is that the differential treatment of United States product versus product from every other origin is the discrimination the statute contemplates.
The dairy proclamation targets Canada’s administration of its dairy tariff-rate quotas under CUSMA. Washington’s complaint is not that Canada maintains dairy TRQs, which the agreement expressly permits, but that Canada allocates them in a way that imposes more restrictive eligibility criteria on American suppliers than the criteria applied to European Union suppliers under the Canada-European Union Comprehensive Economic and Trade Agreement.
Two of the three grievances are, in a narrow technical sense, straightforward to resolve. The automotive surtax is a Canadian federal measure that Ottawa could withdraw by order in council. The provincial alcohol delistings are provincial decisions that could be reversed by ten premiers. Neither is technically complex. Both are politically explosive.
The automotive surtax is Canada’s principal remaining piece of leverage in a trade relationship where most other retaliatory tools have already been spent or withdrawn. Removing it without securing something in return would be read, correctly, as unilateral disarmament. The provincial alcohol bans are, if anything, harder. They were popular. They were adopted by premiers of every partisan stripe. They became a visible symbol of Canadian resolve at a moment when the public wanted one. Asking ten first ministers to put American bourbon back on the shelf in exchange for tariff relief on unrelated goods is a request that no prime minister makes casually.
The dairy issue is different in character. It is a niche administrative question about quota allocation eligibility, precisely the sort of technical irritant that trade agreements have review mechanisms to handle. Holland and Knight described it as “a niche TRQ eligibility problem addressable within the USMCA review.” That framing suggests the dairy proclamation may be the most tractable of the three, though supply management remains among the most politically protected structures in Canadian agricultural policy.
What Is Actually Covered
The scope of the three annexes is considerably broader than their titles suggest, and this is the detail most likely to catch Canadian exporters unprepared.
The motor vehicle proclamation carries the broadest annex, running to eighteen pages and hundreds of eight-digit Harmonized Tariff Schedule classifications. According to the Holland and Knight analysis, none of its 439 traded lines falls within the HTSUS vehicles chapter at all. The covered categories instead span agricultural products, textiles, wood products, cement, furniture, consumer goods, and selected machinery and electrical equipment from Chapters 84 and 85. Representative Chapter 84 items include refrigerating equipment under HTS 8418.69.01, parts for filtering and purifying machinery under 8421.99.01, filling and sealing machinery under 8422.30.91, and mixing, grinding and screening machinery under 8479.82.00.
In other words, a Canadian manufacturer of industrial screening equipment with no connection whatsoever to the automotive sector is exposed to a tariff imposed to remedy Canadian discrimination against American cars. That is a deliberate design feature, not an oversight. The annex is constructed to maximize pressure across the widest possible base of Canadian exporters while avoiding the sectors the American economy cannot easily replace.
The alcoholic beverage annex covers beer, wine, cider, other fermented beverages, and distilled spirits. The dairy annex covers roughly fifty-two tariff classifications including specified milk and cream products, whey, lactose, and casein.
Public summaries of the combined lists describe coverage extending to electronics and telecommunications equipment, furniture and home goods, building materials including lumber, plywood, doors and cement, plastics and packaging, clothing, footwear and luggage, toys and sporting goods, machinery and manufacturing inputs, cosmetics and fragrances, and agricultural products including cut flowers, live plants and seeds. Reporting on the annexes has noted covered items ranging from down feathers and hockey equipment to milk and honey.
The Carve-Outs
Several important exclusions apply, and getting them right is the difference between a manageable cost and an unnecessary one.
Articles already subject to Section 232 import restrictions are exempt from the Section 338 duty. That carve-out is substantial. It covers steel, aluminum and copper products and their derivatives, passenger and commercial vehicles and parts, specified wood products, semiconductors, and patented pharmaceuticals. Canadian steel and aluminum remain subject to a 50 per cent Section 232 tariff, but they do not stack an additional 50 per cent on top.
Qualifying civil aircraft and parts under General Note 6 of the HTSUS and the World Trade Organization Agreement on Trade in Civil Aircraft are excluded. Unmanned aircraft are not.
At the sector level, the annexes do not reach energy, potash, fish, or certain critical minerals. That exclusion set is economically decisive. Crude oil, natural gas, potash and critical minerals represent the single largest block of Canadian export value to the United States, and their absence from the lists reflects a straightforward calculation about American input costs rather than any softening toward Ottawa. Importers should nonetheless verify individual classifications against the controlling annexes rather than relying on sector-level summaries.
Relief under many Chapter 98 provisions is preserved. For goods returned after repair, alteration or processing abroad under subheadings 9802.00.40, 9802.00.50 and 9802.00.60, the Section 338 duty applies only to the value of the foreign work performed. For articles assembled abroad from American components under 9802.00.80, the duty applies to the value of the assembled article less the cost or value of the United States-origin content.
Foreign trade zones offer no escape. Covered goods admitted to a United States FTZ on or after August 19, 2026 must enter under privileged foreign status pursuant to 19 C.F.R. 146.41, and will bear the Section 338 duty when withdrawn for consumption.
One further point on stacking. The Section 232 carve-out is a genuine exclusion, but the Section 338 duty appears to apply on top of other tariff regimes, including Section 301 duties where those are relevant. Importers modelling landed cost should assume additive treatment unless a specific carve-out applies.
The State of Play
The negotiating picture entering the final week is fragmentary but discernible.
LeBlanc and Charette have been effectively resident in Washington. Reporting indicates LeBlanc had planned to travel to the American capital on Monday, August 10, but his flight was diverted back to Montreal because of severe weather. Charette spent that day in meetings with USTR officials regardless. LeBlanc arrived Tuesday and met Greer directly.
The reported objective is to assemble a joint proposal that Greer and LeBlanc can put in front of the President before the deadline. That structure is significant. It suggests the working level in both capitals has converged on at least the outline of a package, and that the remaining uncertainty is presidential rather than technical.
A source familiar with the talks told Reuters last week that Ottawa could offer concessions on some of the irritants the administration has raised in exchange for Washington abandoning the new tariffs. Separately, negotiators have revived a proposal to cap Canadian steel and aluminum shipments to the United States in exchange for relief from the 50 per cent Section 232 metals tariffs, a concept first floated in the autumn of 2025.
Prime Minister Mark Carney has said Canada “stands ready to engage intensively,” and Greer has confirmed that talks have not been broken off. Greer has separately said he hopes to reach interim arrangements with both Canada and Mexico by the end of 2026, while acknowledging that some elements will run into 2027.
Carney has also indicated that “all strategic sectors” are under discussion, which is a formulation broad enough to encompass steel, aluminum, lumber, autos, dairy and energy simultaneously. Whether that breadth reflects genuine flexibility or a negotiating posture is not yet clear from the public record.
Reactions
Ontario Premier Doug Ford has been the loudest voice for a symmetrical Canadian response. Ford has argued that if the tariffs proceed on schedule, Canada should reply “tariff for tariff, dollar for dollar,” a formulation that would imply a fresh round of counter-tariffs on American goods comparable in scale to the roughly C$30 billion in countermeasures Ottawa imposed in 2025. Ford has framed the underlying question in blunt terms, telling CBS News that “when someone comes up and punches you in the face, you have to stand up.”
Carney has not adopted that position. As of Wednesday, the federal government had announced no retaliatory package and continued to describe itself as open to a negotiated outcome. The gap between Queen’s Park and the Prime Minister’s Office on this question is real and will widen if August 19 arrives without a deal.
Not everyone agrees that retaliation is the right instrument. Some Canadian commentators have argued that counter-tariffs impose most of their cost on Canadian purchasers and that strategic patience is the better response to a measure of contested legality. That view has gained ground as the legal vulnerability of the Section 338 action has become clearer.
For business, the dominant emotion is not anger but exhaustion. Canadian Federation of Independent Business research has found that 75 per cent of small businesses report the trade war has increased their stress levels, and 79 per cent identify unpredictable tariff policy as a direct barrier to planning. Manufacturing confidence has been the weakest component of the CFIB’s small business barometer, sitting at 53.7 index points and, by the federation’s assessment, hit harder by tariffs than by either the 2008-09 recession or the pandemic. Where 45 per cent of small businesses nationally reported shipping and receiving costs as a constraint in July, that figure reached 63 per cent among manufacturers, and 77 per cent of manufacturers reported input costs squeezing margins.
Economic Context
The macroeconomic backdrop is better than the political one, though the improvement is fragile.
Statistics Canada reported that total merchandise exports reached a record $77.5 billion in June 2026, up 0.4 per cent, with the merchandise trade surplus widening from $3.7 billion in May to $3.9 billion in June, a fourth consecutive monthly surplus. Exports to the United States rose 0.3 per cent, a fifth consecutive monthly increase, though the surplus with the United States narrowed from $11.1 billion to $10 billion.
The headline figures flatter the underlying performance. Measured in United States dollars, Canadian exports fell 2.0 per cent in June and imports fell 2.1 per cent, reflecting a 1.7 cent decline in the Canadian dollar against its American counterpart, the largest monthly move since October 2022. Much of the record export value is currency translation rather than volume.
The Bank of Canada’s April 2026 Monetary Policy Report assessed the first year of sectoral American tariffs and found the damage concentrated but real. Industries facing sectoral tariffs account for roughly 1 per cent of Canadian output and employment and about 15 per cent of Canadian exports. Steel exports have fallen by half. Softwood lumber exports were roughly 20 per cent below 2024 averages by February 2026. Aluminum exports fell 50 per cent below 2024 levels by July 2025 before recovering more than half those losses as American inventories depleted and producers redirected volume to Europe at lower margins. Copper exports, counterintuitively, ran 40 per cent above their 2024 average as producers shifted into non-tariffed product categories.
The Bank’s central observation was that declines in exports have been “less severe than expected, reflecting both business adaptability and government policy actions.” Its central warning was that this adaptability has limits, and that businesses view the CUSMA review itself as a risk, with diversification away from the United States constrained by transportation costs to more distant markets.
Economists reviewing the June trade data cautioned that new tariffs could stall the momentum, and flagged the likelihood of a front-running bump in export volumes ahead of August 19 followed by a corresponding drop afterward. Any July or August export strength should therefore be discounted heavily.
What This Means for Importers and Exporters
For American importers of Canadian goods and for Canadian exporters selling into the United States, the practical checklist is short and time-sensitive.
Classification comes first. Every Canadian-origin import, including finished goods, components and raw materials, should be run against the three annexes at the eight-digit HTSUS level. Chapters 84 and 85 deserve particular scrutiny because the motor vehicle annex reaches deep into machinery and electrical equipment lines that no reasonable person would associate with automotive trade. Where an item appears on an annex, the next question is whether it is already captured by a Section 232 order, in which case the Section 338 duty does not apply.
Contracts come second. Canadian supplier agreements should be reviewed for duty-risk allocation, price adjustment mechanisms, force majeure language and tariff-escalation triggers. A 50 per cent duty is large enough that contracts silent on tariff allocation will be renegotiated one way or another, and it is better to open that conversation before the money is at stake than after.
Timing comes third. For covered goods, accelerating entries ahead of August 19 has obvious appeal, and some of that has clearly already happened. Firms using foreign trade zones need to confirm the privileged foreign status requirement and understand that FTZ admission no longer defers the duty for covered merchandise.
Fourth, and least comfortable, is the question of how much to spend on all of this given that the measure may not survive. Section 338 has never been used to impose tariffs. Open questions include whether the later enactment of Section 301 superseded Section 338 as the operative discrimination remedy, and whether an ITC investigation is a precondition. Litigation in the United States Court of International Trade is widely anticipated. Canada was previously subject to a 35 per cent tariff on non-CUSMA-compliant goods under the International Emergency Economic Powers Act, and 10 per cent on energy and critical minerals, until those measures were found unlawful by the Supreme Court of the United States. A 10 per cent Section 122 global tariff expired on July 24, 2026.
That history counsels against treating the August 19 date as permanent. It also counsels against assuming relief will arrive in time to matter. Duties paid are recoverable if a measure is struck down, but cash flow is not, and the small exporters least able to finance the interim are the ones with the thinnest compliance capacity. CFIB research has found that while roughly a third of small exporters were affected by tariffs on non-compliant goods, only 26 per cent managed the import process themselves, which is a practical prerequisite for claiming refunds.
What to Watch
Three signals will tell the story over the next eight days.
The first is whether LeBlanc and Greer produce a joint document for the President rather than parallel proposals. A single text implies convergence at the working level and shifts the decision entirely to the Oval Office.
The second is whether Ottawa moves first on any of the three grievances. A federal decision to suspend the automotive surtax, or a coordinated provincial announcement on American alcohol, would be the clearest possible signal that Canada has chosen accommodation over confrontation. The absence of either by the weekend suggests Ottawa has decided to let the tariffs land and litigate.
The third is the steel and aluminum quota track. If a metals arrangement is announced alongside or instead of Section 338 relief, it would indicate the two governments have decided to bank a partial deal rather than risk everything on the deadline.
Whatever happens, the structural lesson of the past three weeks is already legible. CUSMA origin, the compliance objective around which an entire generation of North American supply chain planning was organized, does not protect against every instrument in the American trade toolkit. For Canadian exporters, that is the durable finding, and it will outlast whatever is decided by next Wednesday.