Senior officials of the Trump administration piled on the smears. Add Trump Administration as an interest to stay up to date on the latest Trump Administration news, video, and analysis from ABC News.
But Navarro apologized for the remarks Tuesday, according to The Wall Street Journal, saying that he had tried to send a signal of strength.
The harshness of the language drew fire from many members of Congress, including key Republicans.
The U.S.is not seeking dismantlement of supply management, just greater access and the end of a Canadian system of pricing milk protein ingredients that is undercutting global prices, said Tom Vilsack, chief executive of the U.S. Dairy Export Council and a former U.S. Agriculture Secretary. Ted Cruz, who was born in Calgary. Right after leaving the meet and Canada, Trump tweeted, "Justin acts hurt when called out!".
Navarro's broadside against Trudeau followed Trump's decision over the weekend to pull the USA endorsement of a Group of Seven economic agreement.
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The president also withdrew USA support for a G-7 communique.
Trump said on Twitter that he would not sign the communique, calling Trudeau "very dishonest & weak" for his trade criticism.More news: Rafael Nadal, Dominic Thiem reach finals
"Canadians are polite, we're reasonable, but we also will not be pushed around", said Trudeau.
"Canada does not conduct its diplomacy through ad hominem attacks ... and we refrain particularly from ad hominem attacks when it comes from a close ally", Ms Freeland told reporters in Quebec City on Sunday.
Mulroney has acted as an informal advisor on USA trade to Trudeau's Liberal government.
"I don't know where we're getting the people to actually make this happen ... which will increase inflation and costs [for Americans]".
"I see the television that he's giving a news conference about how he will not be pushed around by the United States. He learned, that's going to cost a lot of money to the people of Canada".
However, he added, "I don't understand the obsession with trade relations with Canada".
After the North Korea summit, Trump said Trudeau's defiant stance against USA tariffs "is going to cost a lot of money for the people of Canada".
Trump also slammed Europe, writing, "the United States pays close to the entire cost of North Atlantic Treaty Organisation - protecting many of these same countries that rip us off on trade". The communique is a final agreement among the countries that details various shared priorities.
Trudeau was away from the House of Commons on a "personal" day on Monday.