What Happened?
The United States and Canada are in a trade dispute. New tariffs, counter-tariffs, and legal challenges have piled up on both sides of the border since 2025, reshaping the commercial relationship. [](#ngr-d0d916dd-c21f-47a9-a063-0e7e8d2065cf)
A Congressional Research Service report on U.S.-Canada trade relations, the nonpartisan agency that researches policy for Congress, lays out the scope of the conflict. In 2025, the United States imposed duties on about 15 percent of imports from Canada by value, covering roughly $56 billion in goods and generating $10 billion in calculated duties.
Why Does it Matter to Me?
Canada supplies 64 percent of U.S. crude oil imports, up from 41 percent a decade ago. Tariffs on that oil, along with duties on Canadian steel, aluminum, lumber, dairy, and alcohol, can raise costs for American manufacturers, builders, and consumers.
Softwood lumber, used widely in home construction, has lacked a governing bilateral agreement since October 2015. U.S. antidumping and countervailing duties on lumber now stack on top of the newer tariffs, meaning the cost of building a home could be affected from multiple directions.
Both Sides, Now
Supporters of the tariffs point to the Section 301 investigation by the U.S. Trade Representative (USTR), which found concerns about enforcement of prohibitions on goods made with forced labor, and to allegations of Canadian discrimination against U.S. commerce cited under Section 338 of the Tariff Act. The administration's actions under Section 338 mark the first express U.S. use of that authority to impose tariffs.
Critics, including the Canadian government, argue the tariffs are unjustified. Canada has challenged the Section 232 steel and aluminum tariffs at the World Trade Organization (WTO) and has kept retaliatory tariffs on U.S. vehicles and C$15.6 billion worth of U.S. steel and aluminum products. The Canadian public has also taken part in an informal boycott of U.S. goods and cut back travel to the United States.
Congress has not passed legislation to block or authorize the tariffs. The legal authority for each round of duties comes from executive branch powers, meaning the president can act without a congressional vote, though lawmakers retain the ability to pass legislation affecting trade policy.
What Happens Next?
A ban on imports of certain Canadian goods, invoked under Section 338, is set to take effect Sept. 29. Most Section 338 tariffs began applying in addition to existing Section 232 tariffs on Sept. 15.
The USTR is pursuing negotiations on a potential plurilateral agreement on critical minerals trade at the president's direction. The United States-Mexico-Canada Agreement (USMCA), the current governing trade framework, is due for a joint review in 2026, and the outcome of that review could reshape the terms of trade between the two countries.
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This article was generated by AI pulling from data. Each article is edited by an editor for accuracy and clarity.
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