TORONTO - Ontario Premier Doug Ford says the U.S. ambassador to Canada should apologize to Ontario's representative in Washington after sources say he shouted profanely about the province's anti-tariff ad.

Sources who spoke to trade representative David Paterson after the incident at an event Monday in Ottawa but were not authorized to speak about it publicly told The Canadian Press that Pete Hoekstra yelled at Paterson over an ad Ontario was running in the U.S.

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