To justify its step, the US has cited the cross-border flow of fentanyl, even though Canada accounts for just 1% of US fentanyl imports and has been working intensively to further reduce the volumes,

U.S. President Donald Trump said on Wednesday that Canadian Prime Minister Mark Carney reached out ahead of an August 1 tariff deadline, but no conversations between the two took place. Trump has warned that any country that does not strike a deal with the U.