So due to the supply management system that Canada has the US dairy industry really is not able to break in and the data backs it up. The tariff has been in place for decades with the USMCA the quotas were supposed to be increased to allow for US competition but that has not happened due to how harsh the tariff is.

Really the "certain conditions" along with the supply management system Canada uses makes it to costly for the US to break into the market because it cant establish a supply chain into it that is stable.

Canada pulled a fast one with this