The Receipt

Status checked July 22, 2026. The Section 338 duties described below are proclaimed but do not take effect until August 19, and the statute permits the President to suspend, revoke, supplement, or amend them before then.

Between February and July 2026 the legal foundation of U.S. tariffs on Canada was rebuilt twice. On February 20 the Supreme Court held that the emergency statute behind the original 2025 tariffs does not authorize the President to impose them [1]. A temporary global surcharge was proclaimed the same day and terminates at 12:01 a.m. Eastern time on July 24 [2]. On July 20 the President signed three proclamations under Section 338 of the Tariff Act of 1930, scheduling an additional 50 percent duty on listed Canadian products effective August 19 [3].

These authorities treat Canada-United States-Mexico Agreement origin differently. The expiring surcharge excluded goods entered duty-free as Canadian or Mexican goods under the U.S. tariff schedule. The Section 338 proclamations contain no exemption based on CUSMA origin; their only express exclusions are for goods already subject to Section 232 duties and certain civil-aircraft articles [3].

Mexico entered a third announced bilateral negotiating round on July 21 [4]. No comparable Canada-U.S. round has been publicly announced. Both Canada and Mexico indicated support for extending the agreement by sixteen years; the United States did not agree, and the agreement now runs to 2036 under annual reviews [5].

Canada has published broad objectives and substantial tariff-response material. It has not published a consolidated assessment of exposure under the new product lists, a chronology of negotiating rounds comparable to Mexico's, or a summary of the proposals it says it has made. Those are the documents that would let the public evaluate the government's position using something closer to the information officials hold.

Ask a Canadian whether the trade dispute with the United States is going badly, and the honest answer is that the public record does not disclose the government's own benchmarks for judging it. The sequence of events is documented. The American reasoning is documented in detail, in proclamations that name Canadian legal instruments by their registration numbers. What is harder to locate is the Canadian government's published assessment of its own exposure and objectives in the current round.

This piece sets out what can be established from primary sources: what has happened, what the legal instruments do, where each country stands, where the two governments' accounts of the same facts diverge, and what indicators over the coming weeks would show which way this is moving. It does not grade anyone's strategy.

What Has Actually Happened

On February 20, 2026, the Supreme Court decided Learning Resources, Inc. v. Trump and Trump v. V.O.S. Selections, Inc., holding 6-3 that the International Emergency Economic Powers Act does not authorize the President to impose tariffs [1]. The decision invalidated the 2025 tariffs on Canada, Mexico and China premised on declared drug-trafficking emergencies, along with the broader reciprocal tariff regime [6].

The same day, the President proclaimed a temporary import surcharge under Section 122 of the Trade Act of 1974, effective February 24 [2]. Section 122 is a balance-of-payments authority capped at 15 percent and limited to 150 days without congressional extension. The surcharge terminates at 12:01 a.m. Eastern time on July 24, 2026 [2]. Goods entered free of duty as Canadian or Mexican goods under General Note 11 of the U.S. tariff schedule were excluded from it [7].

On July 1, 2026, the scheduled joint review of CUSMA arrived. Canada and Mexico had both indicated support for a sixteen-year extension [5]. The United States did not agree to renew the agreement in its current form [8]. Under the treaty's terms the agreement remains in force until 2036, with the parties now meeting annually [9].

On July 20, the President signed three proclamations under Section 338 of the Tariff Act of 1930, each supported by findings about a different Canadian practice: the motor vehicle tariff and quota system, provincial restrictions on U.S. alcoholic beverages, and dairy tariff-rate quotas [3][10]. Each schedules an additional 50 percent ad valorem duty on the Canadian products listed in its Annex II, effective 12:01 a.m. Eastern time on August 19 [3]. The findings identify the Canadian conduct being answered; the product lists are not confined to those sectors, and trade counsel report coverage extending to a broad range of non-automotive and non-beverage goods [11].

On July 21, U.S. and Mexican negotiators opened a third round of bilateral talks in Mexico City, scheduled for three days and covering autos, steel, aluminum, agriculture and labour [4].

The Instruments, in Plain English

Four legal authorities are in play, and the differences between them determine what Canadian exporters face.

Emergency authority is no longer available for this purpose. The Court held that the statute's grant of power to regulate importation does not extend to imposing tariffs [6].

Section 122 is the surcharge now in force until 12:01 a.m. on July 24. It excluded goods entered duty-free under CUSMA preference [7], so for most Canadian exports moving under the agreement it was never the binding constraint.

Section 232 tariffs on steel, aluminum, copper, automobiles and lumber were unaffected by the February ruling and remain in force, with product- and sector-specific rules governing how the duties are calculated [12].

Section 338 is the new element. It authorizes the President to impose duties up to 50 percent to offset a foreign country's discrimination against U.S. commerce, taking effect no earlier than 30 days after the proclamation [3]. Three features of the July 20 proclamations matter.

First, they contain no exemption based on CUSMA origin. The operative text excludes only articles already subject to Section 232 duties and articles covered by the World Trade Organization Agreement on Trade in Civil Aircraft, excluding unmanned aircraft [3]. Major Canadian exports including energy and potash do not appear in the current product lists, but that reflects the annexes rather than a categorical exemption clause.

Second, the proclamations set no termination date. The tariff-schedule modifications continue in effect unless the action is expressly reduced, modified, or terminated [3]. That is a different structure from Section 122, which ends by operation of law.

Third, the proclamations do not identify a completed agency investigation as the basis for the action. The President states his findings directly [3]. That contrasts with Section 301, under which the recent Brazil tariffs followed a year-long USTR investigation with public comments and a hearing [13].

The instruments are durable in the sense that they carry no fixed expiry, and adjustable in a sense the statute makes explicit: Section 338 authorizes the President to suspend, revoke, supplement, or amend any proclamation made under it whenever he deems the public interest requires. The motor vehicle proclamation states that the duties may spur Canada to remove the discrimination identified [3]. Modification during negotiations is legally available on the face of the document, which is a different matter from any conclusion about what the administration intends.

Section 338 was enacted as part of the Smoot-Hawley Tariff Act. The administration and multiple trade-law analyses describe this as the first modern imposition of duties under the provision [14]. Legal challenges are widely expected, and the reasoning cuts both ways: because Section 338 is an express congressional delegation of tariff authority, several practitioners caution that it rests on firmer ground than the emergency statute the Court rejected in February [15]. As of July 22 we found no publicly docketed challenge specifically contesting the July 20 proclamations.

Where Each Country Stands

Mexico is in a formally structured process. USTR announced numbered bilateral rounds, the third of which opened July 21 [4]. Economy Secretary Marcelo Ebrard has said publicly that a rapid conclusion is unlikely and that Mexico's priority in the talks is reducing Section 232 tariffs on steel, aluminum and vehicles [9]. USTR has publicly credited Mexican measures including export-control alignment, intellectual property steps, and action on avocados grown on illegally deforested land [4].

Canada has had no comparable publicly announced round. This is narrower than the common description of Canada being excluded from the table. USTR organized the preparatory negotiations as separate bilateral processes with each country rather than a single trilateral one [16], and President Sheinbaum noted in the spring that the American approach involved more U.S.-Mexico meetings than U.S.-Canada ones [17]. What is absent in Canada's case is a formally designated round within that structure.

Prime Minister Carney's response to the July 20 proclamations described them as a violation of the trade agreement, said Canada has made detailed proposals to resolve the dispute and modernize CUSMA, and said Canada stands ready to intensify discussions. The statement announced no new retaliatory measure [18]. The proposals have not been published.

Two Accounts of the Same Facts

The White House fact sheet accompanying the proclamations states that over the past year and a half only two countries chose to retaliate against U.S. tariffs rather than negotiate: China and Canada [10]. Ambassador Greer's statement describes Canada as continuing to retaliate unlike other partners and allies [19].

The Canadian record establishes what remains and what does not. Canada announced on August 22, 2025 that it would remove its counter-tariffs on U.S. goods with the exception of steel, aluminum and autos, effective September 1; the March 2025 counter-tariffs were removed for most U.S. imports through an order made under the Customs Tariff [20]. Three surtax orders remain: the United States Surtax Order (2025-1), the United States Surtax Order (Steel and Aluminum 2025), and the United States Surtax Order (Motor Vehicles 2025) [20].

The strongest form of the American claim survives that record. The White House does not assert that Canada maintained all retaliation. It says Canada continued to retaliate, and Canada did continue sectoral counter-tariffs, including on motor vehicles. The motor vehicle proclamation names the Canadian instrument directly, citing the United States Surtax Order (Motor Vehicles 2025), SOR/2025-118, and Customs Notice 25-15 [3]. The disagreement is therefore not over whether Canadian countermeasures remained. It is over whether retaining matched sectoral measures, while removing the broader ones, supports the characterization that Canada chose retaliation rather than negotiation.

The American case rests on figures the U.S. government has published. The motor vehicle proclamation states that Canadian imports of U.S. motor vehicles fell approximately 22 percent between April 2025 and March 2026 against the prior period, from roughly $25.9 billion to roughly $20.3 billion, while Canadian imports of motor vehicles from other countries rose by approximately $2.85 billion [3]. The fact sheet states that Canadian imports of U.S. alcoholic beverages fell about 81 percent, or $582 million, from March 2025 through February 2026, that all but two Canadian provinces and territories halted the purchase, distribution or retailing of U.S. alcoholic beverages, and that Canada's tariff-rate quotas on U.S. cheese are more restrictive than those applied to comparable European imports [10].

Provincial restrictions on U.S. alcohol are publicly documented, and several premiers have confirmed them directly [15]. The precise categorization and the count of jurisdictions should be read as the U.S. government's own compilation. The dairy quota comparison is a treaty-administration question on which Canada has not published a detailed public rebuttal.

What Each Country Has to Lose

The case that Canada is in a materially harder position deserves full weight. The proclaimed duties carry no termination date, no CUSMA-origin exemption, and no completed investigation record for a challenge to attack. No formally announced negotiating round is scheduled in which to seek relief. Export concentration limits the practical value of escalation. Domestic cohesion is visibly strained: Ontario Premier Doug Ford has called for matching the tariffs dollar for dollar [18], a position the federal government has not adopted.

The strongest defence of Canada's posture also deserves full weight, and it is more specific than a general preference for restraint. Canada removed its broad counter-tariffs when most CUSMA-compliant goods regained duty-free treatment, while maintaining countermeasures in the sectors where U.S. Section 232 duties remained [20]. On that account the absence of a newly announced response is not necessarily inactivity. It is consistent with an approach that keeps countermeasures matched to existing sectoral measures rather than escalating across the board.

The case that Mexico's position is more comfortable than it appears deserves equal weight. Mexico has taken measures USTR has publicly credited, and it has 52 American demands in front of it by its own Economy Secretary's public account [21]. USTR has proposed requiring that half the value of a North American-built vehicle originate in the United States, a significant departure from current rules and a difficult adjustment for integrated supply chains [4]. A negotiation that continues is not the same as a negotiation that is going well.

Both countries face the same underlying question. Mexico's stated objective is reducing tariffs on goods that comply with the agreement's rules [9]. The July 20 proclamations show that origin compliance can be left unaddressed when a different statute is used. Whatever Mexico secures is secured under the same architecture that produced the July 20 result for Canada.

What to Watch

Six developments would each move the picture in an observable direction.

  • July 24, 12:01 a.m. Eastern: the Section 122 surcharge terminates. What replaces it, and whether any replacement preserves the CUSMA exclusion, would be established by a proclamation, executive order, Federal Register notice or Customs and Border Protection guidance.
  • August 19: whether Customs and Border Protection begins collecting the new duty, whether the product lists are modified, and whether any suspension or exclusion is issued before then.
  • A publicly announced, dated Canada-U.S. bilateral session identified by either government as part of the CUSMA review. Ministerial calls and general engagement would not meet that description.
  • Publication or official announcement of a U.S.-Mexico agreement-in-principle on automotive rules of origin before a formally announced Canada-U.S. round.
  • A docketed legal challenge to the Section 338 proclamations, and whether any court grants interim relief before August 19.
  • Whether Finance Canada or Global Affairs publishes an estimate of Canadian exports covered by the annexes, broken down by sector or province, before August 19.

What Is Not Public

Mexico's negotiating process is easier to follow than Canada's, and the reason is procedural rather than a matter of one government publishing documents while the other issues statements. Mexico's bilateral rounds are formally numbered, dated and followed by public readouts, and its Economy Secretary has described the bargaining agenda in public remarks. Canada has published objectives, consultation material, and detailed tariff-response instruments, including the three surtax orders and their remission schedules [20][22]. What Canada has not published is a chronology of comparable negotiating rounds, a consolidated exposure assessment for the Section 338 product lists, or the general structure of the proposals the Prime Minister describes as detailed and comprehensive [18].

There are real arguments for withholding some of this. The standard case for confidentiality holds that publishing reservation points reduces negotiating flexibility, and governments in Westminster systems conventionally keep negotiating mandates private. That argument applies with full force to the contents of Canada's asks.

It applies less obviously to exposure analysis. An estimate of which Canadian exports fall within the annexes, broken down by sector and province, reveals nothing about Canada's negotiating position. It is the kind of document that lets exporters plan and lets the public understand what is at stake in August.

In our assessment, Canadians have been given information about the government's broad objectives and its tariff response, but not the exposure model, the benchmarks, or the summary of proposals that would allow detailed evaluation of the present negotiating position. Whether that position is working may become clearer over the coming weeks. The federal government holds material that could materially improve public evaluation in the meantime.