Canada Prime Minister Mark Carney in 2025. The tariffs affect Canadian steel aluminum autos and lumber, while Trump threatened new 50% duties on additional Canadian goods by Aug. 19. Canadian and U.S. officials continue negotiations before the Aug. 19 deadline, while Carney said Canada may retaliate if new tariffs proceed. Canada’s trade talks with the U.S. are still aimed at reducing all of the sector-specific tariffs imposed by U.S. President Donald Trump, Prime Minister Mark Carney said. Canadian trade officials have been meeting with their counterparts in Washington over the past few weeks, and Carney said he has also been personally involved in the talks.