Ontario Premier Doug Ford issued a furious rebuke of President Donald Trump on Monday as the trade war between Canada and the United States flared anew, telling a Toronto radio audience that when it comes to Trump, "he can kiss my a—— as far as I'm concerned."

Ford made the comment during a Monday morning appearance on the Bill Carroll Show on Newstalk 1010, the Toronto Sun reported.

Beyond the blunt remark, Ford branded the president a "bully" who is "arrogant and cocky."

In an interview with the Associated Press on Monday, Ford said Trump is misjudging his country's resolve. "He underestimates Canada. We're all in. Up here, we're at a fever pitch; everyone's in for an economic war. They know they're going to have to sacrifice."

Ford said Trump has "declared war, economic war against his closest friend and ally."

The rhetorical escalation comes in one of the world's largest bilateral trading relationships: more than $2 billion worth of goods and services cross the Canada-U.S. border each day, and much of that commerce runs through Ontario, Canada's most populous province and its manufacturing heartland.

It is not the first time the Ontario premier has unloaded on Trump, having previously gone so far as to threaten to flip the power switch to the United States. He revived that warning in his AP remarks, saying "everything is on the table" if the trade war continues — including cutting off power and minerals from Ontario.

"I'll cut them off," Ford said of critical minerals. "You won't get a grain of sand out of Ontario."

"We power 1.5 million homes and businesses," Ford explained. "Everything's on the table. I'll do whatever it takes."

Ontario sells surplus electricity into neighboring states including New York, Michigan and Minnesota, and earlier this year Ford briefly imposed a surcharge on those exports before withdrawing it when Washington threatened retaliation.

If Trump keeps trying to destroy Canadian manufacturing, Ford said, "he better have a pack of batteries."

"What would they do without the high-grade nickel that we ship down to the U.S.?" Ford asked. Ontario's nickel comes largely from the Sudbury basin, one of the world's largest sources of the metal, which supplies U.S. stainless-steel and battery-making supply chains.

He also encouraged Canada to consider using oil as leverage, as fuel costs have continued to inch up again amid the Iran war.

Canadian Prime Minister Mark Carney, a former central banker who led both the Bank of Canada and the Bank of England before succeeding Justin Trudeau earlier this year, said that, as of Sept. 8, he would be recommending Canada match "dollar for dollar" each of Trump's 50 percent tariffs, the Sun reported.

Trump, who negotiated the previous trade deal with Canada — the United States–Mexico–Canada Agreement that replaced NAFTA in 2020 and is due for its scheduled joint review in 2026 — has countered that "Canada has been ripping off the United States of America for years."