...involves what’s called a tariff rate quota system.

All the folks cheering on Canada as they want to have it both ways? You don’t know what they do.

international.gc.ca - Supply managed gestion offre

Straight from their own website.

Global Affairs Canada manages Canada’s market access commitments for supply-managed goods through a series of tariff rate quotas (TRQs) which allow for the import of a pre-determined volume at lower (within-access) rate of duty. Imports over these pre-determined volumes are normally subject to higher rates of duty.

In other words they let in small quantities of goods at a low rate then elevate the hell out of the tariff after that.

How much. A curious mind might ask? Milk goes from 7.5% to 241%. Steel IIRC is 50%.

Bear in mind this is how they deal with us - they eat free access to the US market but don’t want us to have access to theirs. And they want side deals with Canada, which opens the door to them importing cheap Chinese input components which would allow Canadians to package them up into tariff-free goods for sale in the US.

Sorry. Screw Canada if that’s what they want.