Declaring a national emergency on the US-Canada border, and, under the International Emergency Economic Powers Act, imposing a 25% tariff on Canadian goods for consumption and a 10% tariff on Canadian energy and energy sources.
https://www.federalregister.gov/documents/2025/02/07/2025-02406/imposing-duties-to-address-the-flow-of-illicit-drugs-across-our-northern-border