His apology came days after Trump and Trudeau verbally sparred over the G7 summit in Canada.
During an interview with ABC's George Stephanopoulos, Trump recounted seeing Trudeau's statement following the G7 summit in Quebec, Canada, during which the prime minister promised to fight back against the US's trade restrictions.
In striking such a hostile tone against one of the oldest and closest USA allies, Navarro said Tuesday he was emboldened to send a "strong signal of strength" on the eve of the landmark summit between Trump and North Korean leader Kim Jong Un.
Trump's top economic adviser, Larry Kudlow, suggested that Trump saw Trudeau as trying to weaken his hand before the summit with Kim.
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US President Donald Trump has renewed his attacks on America's closest allies following the divisive G7 summit in Canada at the weekend.
Trudeau had simply reiterated Canada's stated plan of imposing retaliatory dollar-for-dollar tariffs in response to the new American tariffs on imported steel and aluminum. "That's what bad-faith Justin Trudeau did with that stunt press conference", Navarro said.
Mr. Trudeau especially objected to the Trump administration's justification of the tariffs, saying Ottawa isn't a national security threat to Washington.
Canada's prime minister earned Trump's ire by giving a press conference, after the USA president left La Malbaie, in which he spoke critically of U.S. trade policy and said Canada would "move forward with retaliatory measures" in response to Trump's move to impose tariffs on aluminum and steel. But he also said that critical comments from Justin Trudeau would cost Canada "a lot of money".
"He (Trump) is not going to permit any show of weakness on the trip to negotiate with North Korea", Kudlow said.
They were also thankful for the trade we do with the USA, our military aid, the underground railroad, the refugee program, our inclusivity and, of course, hockey and Tim Hortons.
"I want to pay a particular tribute to Prime Minister Trudeau for his leadership and skilful chairing, which enabled us after two days of negotiation between leaders to agree actions and a shared approach on some of the most pressing challenges facing the global community and our citizens", she told parliament.