Mexican President Claudia Sheinbaum said on Wednesday that she had spoken with Canadian Prime Minister Mark Carney and that the two had agreed to strengthen trade collaboration, particularly in light of the tariffs from U.

The imbalance in President Trump’s treatment of America’s closest trading partners may come from his desire to make Canada the 51st state, some Canadians believe.

Trump has justified tariffs on goods from Canada, the top U.S. export market, by accusing it of failing to stop the cross-border flow of fentanyl, even though U.S. government data shows Canada accounts for only 1% of the fentanyl that enters the United States.