US President Donald Trump's trade policy adviser, Peter Navarro, has apologized for the "inappropriate" comment he made about Canadian Prime Minister Justin Trudeau.

On Tuesday, Navarro said, "Let me correct a mistake I made," telling the audience at the Wall Street Journal's annual CFO Network conference that "in conveying that message, I used language that was inappropriate and basically lost the power of that message. I own that, that was my mistake, those were my words."

Asked if he were apologizing to Trudeau, he said, "Yeah, absolutely."

Navarro’s comment came after Trudeau, following the G7 summit in Quebec, said Canada would not be pushed around on trade, prompting Trump to withdraw his endorsement of the joint communique put out by the heads of the Group of Seven industrialized nations.

In an interview on "Fox News Sunday," Navarro had said that "there's a special place in hell for any foreign leader that engages in bad faith diplomacy with President Donald J. Trump and then tries to stab him in the back on the way out the door."