For businesses caught in the Canada-U.S. trade fight, the latest tariff move brings relief and a fresh headache at the same time. President Donald Trump signed a proclamation on October 23 removing the additional 50% Section 338 duty from selected Canadian products, including some plywood, paper packaging, refrigeration equipment and agricultural machinery. The same order adds a new group of Canadian goods to the 50% list, with the changes taking effect October 30.
The timing is politically charged. The new rules begin just four days before the November 3 U.S. midterm elections, as Republican candidates in border states face voter frustration over prices and cross-border trade. The White House describes the move as a refinement of its trade response to Canada, not an election measure. Even so, the exemptions follow direct pressure from Republican lawmakers whose states depend heavily on Canadian supplies.
The Rollback Is Narrow, Not a Trade-War Truce
The latest order is best understood as a reshuffling of the tariff map rather than a ceasefire. Trump’s proclamation removes certain Canadian goods from the additional 50% Section 338 duty while placing other products under the same levy. The White House says the changes are intended to serve the public interest while continuing to counter what it describes as Canadian discrimination against U.S. commerce.
That distinction matters for companies on both sides of the border. Relief for one tariff line does not mean Canada is broadly returning to duty-free access. Covered goods can still face other U.S. duties, and the proclamation says Section 338 tariffs apply in addition to Section 232 tariffs. The new treatment begins at 12:01 a.m. Eastern time on October 30. Because the administration can suspend, amend or supplement Section 338 actions again, importers are being asked to plan around a policy framework that can change quickly.
Maine Farmers Won Some of the Clearest Relief
The clearest beneficiaries are industries that depend on specialized Canadian packaging and equipment, particularly in Maine. The relief list includes corrugated paper cartons, plastic boxes and crates, certain sacks and bags, refrigeration equipment, packing and wrapping machinery, machinery used to clean or grade agricultural produce, edible seaweed and algae, and several plywood categories. Republican Sen. Susan Collins said nine categories were important to Maine’s agricultural economy.
For blueberry, potato and apple growers, these are not abstract customs codes. Collins said farmers rely on Canadian equipment and packaging that are either unavailable from U.S. suppliers or costly to replace. Maine’s wild blueberry industry, for example, uses harvesting boxes sourced from Canada. Removing a 50% surcharge from such inputs can change a farm’s seasonal operating costs. Collins has also pointed to earlier exemptions involving road salt, cement and pulp as evidence that targeted carve-outs can ease pressure without ending the broader dispute.
Washington Shifted the 50% Tariff Onto New Products
The tariff relief is being offset by a list of newly targeted Canadian products. The White House annex adds sweetened cocoa powder, certain paints and varnishes, shampoos, soaps, lubricating preparations, diagnostic and laboratory reagents, municipal and clinical waste, vinyl flooring, wood products, wooden coffins and a wide range of carpets and textile floor coverings. The list also reaches goods such as window air conditioners, chest freezers, hand tools, valves, canoes and archery equipment.
That breadth shows why the announcement is not a straightforward victory for Canadian exporters. Some firms are moving off the 50% list while others are moving onto it. Even within a product family, treatment can depend on the Harmonized Tariff Schedule classification. For smaller exporters, a product description that sounds similar to an exempted item may still fall under a newly taxed code. The result is a trade regime that rewards careful customs classification and punishes assumptions.
Susan Collins Put Tariffs at the Centre of a Tight Race
The political backdrop is impossible to ignore, even though the White House has not presented the exemptions as an election intervention. The changes take effect October 30, four days before the November 3 midterms. Collins is in a reelection contest against Democrat Troy Jackson, and she said the exemptions followed repeated conversations with U.S. Trade Representative Jamieson Greer, Commerce Secretary Howard Lutnick and other administration officials.
Tariffs have become a concrete campaign issue because voters encounter them through business costs, farm inputs and retail prices rather than abstract trade-policy jargon. Jackson has argued that Collins is seeking credit for limited relief after supporting the administration, while Collins says she has been pressing for broader tariff relief and a new agreement with Canada. The dispute gives both sides a campaign story: one argues influence can produce exemptions, while the other argues the underlying policy created the problem in the first place.
Other Republicans Are Breaking With Trump on Canada
Maine is not the only place where Canada policy has become an election-year headache for Republicans. In Michigan, Republican Senate candidate Mike Rogers has called for an end to the tariff fight, saying the state’s economy is too closely tied to Canada for the dispute to continue. Michigan’s auto industry depends on cross-border supply chains, making tariffs more visible there than elsewhere.
Pressure has surfaced elsewhere. New Hampshire Republican Senate candidate John Sununu has criticized the trade war with Canada, while in Kansas, lawmakers pushed back after Trump threatened restrictions on Bombardier. The Canadian aircraft maker employs about 1,500 workers in Wichita, and Trump dropped the threatened ban after appeals that included Republican Sen. Roger Marshall. These episodes do not prove every trade adjustment is election-driven, but they show candidates in competitive races increasingly asking the White House for exceptions when tariffs collide directly with local jobs and consumer prices.
The Trade Fight Has Escalated Quickly Since August
The October change is only the newest turn in a dispute that escalated rapidly over the summer. On July 20, Trump announced 50% tariffs on selected Canadian goods under Section 338, targeting products linked to disputes over alcohol, dairy and motor vehicles. The effective date was briefly postponed during negotiations, but the duties ultimately took effect on August 22 after the two governments failed to reach an agreement.
Canada responded with its own countermeasures. Ottawa imposed tariffs ranging from 15% to 50% on C$27.6 billion worth of U.S. goods starting September 8, matching the value of the U.S. Section 338 action dollar for dollar. Washington then expanded the conflict, adjusting product lists and imposing import bans on certain Canadian alcohol, dairy and motorcycle-related products. What began as leverage for a negotiated settlement has therefore become a layered system of tariffs, exclusions, counter-tariffs and outright bans that businesses must track simultaneously.
Section 338 Has Become a Legal Battleground
The legal foundation for the 50% duties is under challenge. Trump relied on Section 338 of the Tariff Act of 1930, a rarely used provision authorizing the president to respond when a country is found to discriminate against U.S. commerce. The Congressional Research Service says the 2026 Canada action was the first time a president expressly cited Section 338 to impose tariffs, making the policy a test of executive trade power.
That test is in court. Gellert Global Group, a New Jersey food importer that brings Canadian cheese into the United States, sued the administration in the U.S. Court of International Trade on October 20. The company argues trade laws superseded or constrained Section 338 and that the president exceeded Congressional authority. The White House says it will defend the tariffs. For importers paying duties, the case adds uncertainty over whether costs already incurred could later be challenged or refunded.
CUSMA Compliance Does Not Automatically Shield These Goods
The dispute is significant because the 50% Section 338 tariffs do not automatically spare goods that qualify under the U.S.-Mexico-Canada Agreement. The White House says the duties apply to covered Canadian goods regardless of USMCA origin. That weakens a practical benefit companies normally expect from meeting North American rules of origin: preferential tariff treatment.
The uncertainty is arriving during a moment for the trade pact itself. The United States declined to renew USMCA in its current form at the July 1 joint review, although the agreement remains in force and annual reviews will continue. The stakes are large. Congressional Research Service data show Canada took 38% of U.S. automotive exports in 2025, worth about $61 billion, while Canada supplied roughly 12% of U.S. automotive imports, worth about $53 billion. When tariffs cut across an integrated market of that scale, narrow product changes can ripple through suppliers, inventories and investment plans.
Businesses Still Face a Moving Target
For Canadian businesses, limited relief does not equal stability. The Canadian Federation of Independent Business reports the October 30 changes remove nine categories from the 50% list but add goods including chemicals, wood and paper products, flooring, appliances, tools and medical or laboratory equipment. Earlier in the dispute, CFIB estimated that 40% of Canadian exporters would be directly hit by the August tariff round.
Ottawa is treating the change cautiously. Canada-U.S. Trade Minister Dominic LeBlanc said the government is assessing the changes while remaining ready to pursue a beneficial arrangement that respects Canadian interests. Forestry and agricultural groups have stressed the need for rules-based trade rather than repeated product-by-product changes. For companies deciding whether to sign contracts, stock inventory or invest in U.S.-bound production, the biggest risk may be less about a tariff rate. It is the possibility that the list changes again before the next shipment crosses the border.
