Democratic Sen. Tim Kaine of Virginia says U.S. President Donald Trump’s outrage toward Canada over an anti-tariff advertisement by the Ontario government is “a temper tantrum” that will blow over — but it’s embarrassing for the United States.

“It’s just one more example of super childish behaviour by the president,” Kaine said in an exclusive Canadian interview on airing Sunday morning. “The ad was a very fair ad."

Canada’s trade discussions with the U.S. have been plunged into peril after Ontario aired an advertisement featuring audio clips by then-president Ronald Reagan, who criticized tariffs during an address he delivered in 1987.

The advertisement appears to have deeply angered Trump, who blasted Canada on Saturday afternoon on social media and promised to increase “the Tariff

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