A White House fact sheet issued puts two dated escalation steps on the calendar, layered on top of existing 50% Section 338 tariffs.
The next phase of the U.S. tariff action against Canada begins Tuesday.
According to a White House fact sheet dated , President Trump signed five proclamations under Section 338 of the Tariff Act in response to roughly $20 billion in Canadian retaliatory tariffs. Two of the resulting actions carry forward effective dates that have not yet arrived.
The first lands tomorrow, : a product substitution within the tariff schedule that removes rock salt and cement from scope while adding all-terrain vehicles and additional dairy products. The second arrives , when import bans take effect on Canadian alcoholic beverages and dairy products.
Both sit on top of the existing 50% Section 338 tariffs already in force.
Why the substitution matters more than it looks
Swapping rock salt and cement out for ATVs and additional dairy is not a neutral reshuffle. It moves the tariff burden off two low-margin, high-volume construction inputs that raise costs for U.S. buyers, and onto a consumer durable and a farm-supported commodity category. That is a change in who absorbs the cost domestically, not only in what Canada exports.
For U.S. importers of Canadian cement and rock salt, tomorrow removes a cost. For domestic distributors of Canadian ATVs, it adds one, with a day's notice from the point at which most people learned the date.
The step is a different instrument
A tariff is a price. A ban is a quantity restriction, and it cannot be absorbed by paying more. Import bans on alcoholic beverages and dairy give affected U.S. distributors and retailers roughly two weeks to find replacement supply or accept the gap, and give Canadian producers the same window to find other buyers.
Dairy appears in both actions, first as an addition to the tariff schedule tomorrow and then inside the import ban at the end of the month. The practical effect is that some Canadian dairy products face a higher tariff for two weeks before the category is barred outright.
The open question
What is not on the calendar is Canada's answer. The proclamations are themselves a response to Canadian retaliation, which makes the next move Ottawa's, and nothing in the U.S. action specifies what would cause either of the two forward-dated steps to be suspended or withdrawn.