President Donald Trump signed a proclamation on October 23 further modifying the scope of Canadian products subject to the 50 percent tariffs imposed under Section 338 of the Tariff Act of 1930, the White House said. The changes take effect on October 30, four days before the U.S. midterm elections. It is the third adjustment to the Canada tariff regime in roughly three months, and it both removes and adds products: plywood sheets, packing crates, bleached paper, paperboard, plastic boxes, seaweed and some machinery come off the tariff list, while cocoa powder, vinyl flooring, shampoos and wooden coffins go on it, according to the White House fact sheet and reporting from CTV News and financial media.
The tariff program itself dates to July 20, when Trump signed a series of proclamations under Section 338 imposing 50 percent duties on about $20 billion of Canadian imports — wine, hockey sticks, cement and other goods — in response to what the administration called Canadian discrimination against U.S. commerce. U.S. Trade Representative Jamieson Greer issued a statement in September defending the actions as a response to Canada's continued retaliation and announced additional measures including the removal of $50 billion worth of Canadian-origin products from GSA Multiple Award Schedules. The September proclamations added import bans covering Canadian alcoholic beverages, certain dairy products, molasses, non-alcoholic beer and motorcycle products, effective September 29.
Politics, not just trade
The October 23 adjustment is widely read as political. Multiple foreign media analyses, cited by People's Daily and Xinhua, note that the exempted Canadian goods matter disproportionately to Maine, and that Trump made the change under midterm election pressure to help Republican Senator Susan Collins in a competitive reelection race. Collins has lobbied the administration directly: in an August letter she warned that approximately $170 million worth of goods would be subject to the announced Canadian tariffs, with roughly 62 percent coming from the forest products sector, which supports about 30,000 jobs and contributes more than $8 billion to Maine's economy. After the October 23 order, Collins said the measures would help Maine's blueberry, potato, apple and seaweed producers, whom she called "an important part of our state's economy." The order covers nine categories of agricultural, forestry and packaging products, per Spanish-language coverage of the announcement, and the White House said the president was seeking to offset "the burden to U.S. commerce."
Reaction and implications
The business response is mixed. For U.S. importers of plywood, paperboard and plastic packaging — industries that had been absorbing the 50 percent surcharge — the removal is a direct cost relief, and the timing ahead of the holiday shipping season amplifies the benefit for retailers and manufacturers. For producers of the newly listed goods — cocoa, vinyl flooring, shampoo — the addition is new exposure with no transition window. Canadian officials had earlier contested the legal and economic basis of the Section 338 measures: Global Affairs Canada maintains a public FAQ on the softwood-lumber duties explaining their scope and effect on Canadian exports, and trade-law firms including Dorsey flagged the September import bans as an escalation that expanded the dispute beyond the original trade irritants. Analysts quoted by financial media note the pattern of the administration's tariff policy: it is not retreating from Section 338 as a tool, but shifting its points of application, which makes supply planning for North American trade harder rather than easier. The core structure of the dispute remains unresolved, and the October 23 modification does not address the underlying retaliation cycle.
The sectoral arithmetic matters as much as the politics. Maine's forest-products industry — the biggest beneficiary of the removals — supports roughly 30,000 jobs and more than $8 billion of state economic activity, per Senator Collins's office, and nearly 90 percent of Maine is forested; for those producers, the duty relief restores access to U.S. markets for plywood and packing materials that had been priced out since July. On the other side, U.S. buyers of Canadian cocoa powder, vinyl flooring and shampoos now face a 50 percent surcharge that was not in their cost models a week ago. For logistics operators, the October 30 effective date means bonded cargo already in transit must be re-examined against the new classification list, and customs brokers face a compressed window to update classification guidance before shipments cross the border.
For B2B buyers and logistics planners, the practical takeaway is that the Section 338 regime is now a moving target updated on election-cycle timing. Customs classifications, country-of-origin documentation and supplier contracts signed in July may no longer reflect the duty treatment as of October 30, and the new additions arrive with immediate effect. Trade coverage from AP, Xinhua and CTV all frame the adjustment as the latest round in a tariff war that has become a regular feature of North American supply chains — one that businesses now price into sourcing decisions as a recurring variable rather than an anomaly. The changes take effect at the end of this month; the next adjustment, if history is any guide, is a matter of weeks away.
