Prime Minister Mark Carney will sit down with Canada's premiers in Huntsville, Ont., Tuesday to deliver a detailed briefing about his government's ongoing trade negotiations with the Trump administration.

U.S. President Donald Trump and Carney agreed in June at the G7 summit to try and reach a trade deal by July 21, but Trump recently moved that deadline to Aug. 1.

Carney's briefing on how those negotiations are going lands in the middle of the three-day first ministers' meeting where the premiers are discussing their own response to the trade war.

Carney said he was coming to the meeting shortly after Trump announced his intention to impose 35 per cent tariffs on non-CUSMA compliant goods, referring to Canada's trilateral trade deal with the U.S. and Mexico.

Ontario Premier Doug Ford,

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