Navarro's willingness to walk back his outburst marked a departure from the Trump administration's never-say-you're-sorry approach to political crises.
Navarro, for his part, suggested that he was following orders - but made a poor choice of words in doing so.
"My job was to send a signal of strength", he said at a conference in Washington on Tuesday.
On Trump's handling of trade - where the populist president has taken major steps to enact his economic nationalist agenda - almost 80 percent of Republican voters said they approve of trade actions thus far.
Trudeau last week said in a U.S. television interview that Canada had "flexibility" on dairy, while U.S. Agriculture Secretary Sonny Perdue told U.S. Farm Report that Canada offered dairy concessions that were insufficient.
"I will always protect Canadian workers and Canadian interests", Mr Trudeau said.
- Donald J. Trump (@realDonaldTrump) June 9, 2018Fair Trade is now to be called Fool Trade if it is not Reciprocal.
Trump is expected to attend the North Atlantic Treaty Organization summit July 11-12 in Brussels, a gathering whose goal was to re-affirm the trans-Atlantic partnership - and that was before Trump withdrew from a G-7 statement on trade, insulted Canadian Prime Minister Justin Trudeau and accused Germany of freeloading on US military spending. "And I see the television, and he's giving a news conference about how he will not be pushed around by the United States". I like him. But he shouldn't have done that. Kudlow explained on CNN that the administration was lashing out at Trudeau to show Kim that Trump was not weak.
"We finished the [G7] meeting and really everybody was happy". The U.S.at the end of May imposed tariffs of 25 percent on steel imports and 10 percent on aluminum imports against Canada, Mexico and the European Union. It was very friendly. "And it won't even be tough". "We just shook hands!'" Trump said Tuesday. "Let's be serious", a statement by the French government said Sunday.
Trump says the U.S.
For dairy products, which has been the focus of Trump's anger, those tariffs range from almost 300 per cent for excess imports of butter and cream to 270 per cent for certain dairy powders to 240 per cent for cheese, whole milk and yogurt.
"We hope it doesn't come to that, but if the USA tariffs remain in effect, we will impose our tariffs on July 1", he said.
Trump's extraordinary outburst in recent days appeared aimed at striking a chord with voters who support his "America First" agenda.