OTTAWA, September 8 — On the ground in Canada’s capital, the machinery of retaliatory trade war grinds on. Six months after Prime Minister Justin Trudeau’s government slapped tariffs on American milk, perfume, golf clubs and dozens of other U.S. goods, the standoff with Washington shows no sign of breaking. The scene by nightfall: officials on both sides talking past each other while billions in cross-border commerce sits under the weight of reciprocal duties.
It began with steel and aluminum. In 2018, President Donald Trump’s administration imposed tariffs on Canadian steel and aluminum, citing national security concerns.
Those tariffs were lifted in 2019 as part of negotiations for the United States-Mexico-Canada Agreement. The reprieve proved temporary. This past February, the Trump administration reimposed the same tariffs, again invoking national security.
Canada’s response came swift and calibrated. On March 1, 2025, Trudeau’s government activated retaliatory measures targeting approximately C$29.8 billion (about US$22 billion) worth of American exports.
The Canadian Department of Finance released the full list: dairy products, cosmetics, sporting goods, and more. The tariffs took effect immediately. The dairy sector carries particular political voltage in Canada.
Ottawa’s supply management system — a tightly controlled production quota regime — makes agricultural trade a perennial flashpoint in bilateral talks. American access to Canadian dairy markets was already a contentious element of the USMCA negotiations. The new Canadian tariffs land directly on that sensitive territory.
Washington’s Position
The Trump administration has held its ground. National security remains the stated justification for the original U.S. tariffs on Canadian metals. The reimposition in February 2025 reset the clock on a dispute that both governments had briefly managed to shelve.
Canada is no minor trading partner for the United States. Residents describe the integrated supply chains that span the 49th parallel — and the economic disruption now threading through them.
For many American states, Canada ranks as the largest export market. The tariff architecture on both sides threatens that flow. The Canadian government has left the door cracked for negotiations.
But Ottawa has attached a firm condition: its tariffs stay until Washington lifts its own. The message from Trudeau’s team has been consistent since March — no unilateral Canadian retreat.
What Comes Next
Both governments continue to accuse the other of unfair trade practices. The dispute has become a defining irritant in bilateral relations during Trump’s current term, with Vice President JD Vance and Secretary of State Marco Rubio part of an administration that shows no indication of reversing its February tariff decision. Further developments are expected as negotiations continue.
The trade war’s implications extend across sectors and state lines — from dairy processors in Wisconsin to aluminum smelters in Quebec. For now, the duties remain in place, the talks remain active, and the economic pressure on both economies continues to build.
