Conservative Leader Pierre Poilievre has penned a scathing letter to the prime minister ahead of his meeting with the U.S. president this week, saying Mark Carney has been a disappointment on the trade file and needs to come back from this trip with some wins for Canada.

In the letter, which was shared with CBC News, Poilievre said Carney promised to "negotiate a win" for Canada and deliver some tariff relief this summer, but that didn't work out as planned.

Carney and U.S. President Donald Trump blew past a self-imposed Aug. 1 deadline for a deal on the border and fentanyl-related tariffs and the so-called Section 232 tariffs on steel, aluminum , autos and other Canadian products.

Trump has only ramped up the pressure on Canada since then, with new tariffs on lumber and furniture a

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