Trump bans 68 Canadian product lines from US import on September 29

President Donald Trump signed three proclamations on September 8 that bar 68 categories of Canadian goods from entering the United States altogether. The bans take effect at 12:01 a.m. eastern time on September 29, 2026, according to the proclamation covering alcoholic beverages.

The instrument is Section 338 of the Tariff Act of 1930, and it does two separate things. It caps additional duties at 50 percent ad valorem. It also lets a president exclude a country’s articles from importation outright, once he finds that the country has maintained or increased its discrimination against US commerce. Trump used the duty half in July, and he’s now using the exclusion half.

We counted the tariff lines in the annexes to all three proclamations. Alcohol carries more than three times the combined weight of the other two lists.

Proclamation	HTSUS lines banned	What is on the list
Alcoholic beverages	53	Beer, wine, cider, whisky, rum, gin, vodka, brandy, liqueurs
Dairy	14	Whey products, molasses, non-alcoholic beer
Motor vehicles	1	Motorcycles and mopeds over 800 cc

The dairy list is the one worth reading closely, because it names no cheese and no milk. Eight of its 14 lines are whey, from fluid whey to whey protein concentrates. Five are molasses. The last is non-alcoholic beer.

The motor vehicle ban is narrower still, at a single line. It covers motorcycles and mopeds with a piston engine of a cylinder capacity over 800 cc. Nothing else in the auto sector is excluded.

The escalation has a documented trail. Proclamations 11046, 11047 and 11048 of July 20 imposed the additional duties, effective August 19. A later proclamation suspended them for three days after Canada committed to remove the measures at issue. The new texts state that Canada reneged on August 21, and the duties went live at 12:01 a.m. on August 22.

Canada’s account of that week differs, which matters because the finding of bad faith is what unlocks Section 338. Prime Minister Mark Carney terminated the talks on August 21, citing what he called uneconomic and unfair last-minute demands from American officials, NBC News reported. Trump administration officials have disputed that. The alcohol proclamation adds a fresher grievance: Saskatchewan announced an extra 50 percent levy on US alcoholic beverages, effective September 8.

It’s really just Canada and China who thought, ‘I’m not going to do tariffs, I’m going to start banning stuff.’ They set this precedent.

Senior administration official, via Semafor

Even so, the tariff track keeps running alongside the ban. A second set of proclamations reshuffles the existing tariff list rather than the ban list, effective 12:01 a.m. eastern time on September 15. Cement, road salt and hospital pads come off, and all-terrain vehicles, some cheeses and motorboats go on, per NBC News. A senior official told Semafor the swap was meant to minimise the impact on US supply chains.

The catch for US exporters is that the retaliation already happened. The US spirits trade says it’s absorbed most of it.

Canadian provinces’ removal of US spirits from store shelves caused US spirits exports to Canada to fall by more than 70%.

Chris Swonger, President and CEO, Distilled Spirits Council of the United States, via Business Insider

The proclamations also anticipate a court fight. The alcohol text says that if the import ban is invalidated for a given import, the 50 percent duty from Proclamation 11046 applies to that import instead. Goods that arrived before September 29 but haven’t been entered for consumption stay at 50 percent too.

That fallback matters because Washington’s trade instruments keep reversing under the firms that plan around them. Chip export controls loosened in January and tightened again in May, and US AI rules still arrive as a state-by-state patchwork rather than one federal statute. Policy by proclamation moves faster than a procurement cycle.

A negotiating window is still open, even after all that. US Trade Representative Jamieson Greer has spoken with Canadian Trade Minister Dominic LeBlanc, and the two sides plan to attempt an alternative pathway before the end of the month, Semafor reported. LeBlanc said he is in contact with Greer and that Canada would engage in good faith, per NBC News.

Two dates decide what this costs. September 15 changes which goods carry the 50 percent duty, and September 29 closes the border to the 68 banned lines. Trump still intends to raise tariffs on Canadian autos in January absent a deal, the official told Semafor.