President Trump announced Saturday that he is raising U.S. tariffs on Canada by an additional 10% in response to the continued airing of an anti-tariff advertisement created by the local government of the Canadian province of Ontario.

In a post to Truth Social Saturday afternoon, Mr. Trump described the airing of the ad during Friday night's Game 1 of the World Series as a "hostile act."

"Because of their serious misrepresentation of the facts, and hostile act, I am increasing the Tariff on Canada by 10% over and above what they are paying now," Mr. Trump wrote.

The move comes even though Ontario's leader said the ad would be halted beginning Monday.

CBS News has reached out to the White House for comment on when such an increase would take effect and what imports it would appl

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