September 10 Trade Updates: U.S.-Canada Tariffs; What to Watch for Next

September 10, 2026

On September 8th, Canada imposed tariffs on $20 billion worth of U.S. goods, focused primarily on milk, cream, cheeses, several railway or tramway track materials, and others. (View the link to the full list here.)   In response, President Trump imposed additional import bans, including liquor, wine, and milk byproducts, such as whey used for protein supplements, and molasses. The additional changes will take effect on 29 September. (See full proclamation here.) 

Additionally, President Trump invoked Section 338 under the Tariff Act of 1930, which permits the president to impose tariffs on countries engaging in unfair trade practices. Trump deployed the same statute last month on Canadian exports. Under Section 338, if a country subject to U.S. tariffs retaliates, the president can respond with an import ban on certain goods. Trump additionally called for the administration to remove Canadian-origin products in response to Canadian provinces, particularly Ontario, barred agencies from purchasing certain goods from U.S. firms—for instance, a contract with Starlink.  

The Canadian federal government has not instituted a ban on American goods, but has requested government agencies prioritize Canadian goods in contract procurement.  

What to Watch Out For:  

The Trump Administration is working on a series of additional tariffs targeting other countries that produce products in “excess capacity.” Countries that the USTR is investigating include:  

• China 
• European Union members 
• Singapore 
• Switzerland 
• Norway 
• Indonesia 
• Malaysia 
• Cambodia 
• Thailand 
• South Korea 
• Vietnam 
• Taiwan 
• Bangladesh 
• Mexico 
• Japan 
• India 

Taxes on these countries are anticipated to go into effect this week, with the intention of replacing the duties struck down by the Supreme Court earlier this year.  President Trump has additionally proposed blocking trade with countries that import more from the U.S. than they import. This would particularly impact Europe and Asia.