
When the administration of U.S. President Donald Trump decided to reimpose tariffs on Canadian aluminum in August—claiming there was too much aluminum headed south to the United States—it looked like an electoral stunt. After all, two U.S. companies in red states key to Trump’s reelection had been actively pushing for tariffs’ return.
Given the stakes, Canadian policymakers thought it unlikely that the tariffs would be lifted before the Nov. 3 U.S. presidential election. Ottawa nevertheless tried to overturn Washington’s decision. And, surprisingly, it succeeded.