Kudlow said on CNN that Trump's reaction to Trudeau's comments has been "in large part" because he does not want "any show of weakness" ahead of that meeting. "Not fair to the PEOPLE of America!" he tweeted.
And it concludes with a direct shot at Trump, calling on the House to "reject disparaging and ad hominem statements by US officials which do a disservice to bilateral relations and work against efforts to resolve this trade dispute".
But the criticism left a former Canadian prime minister, Stephen Harper, stumped. The Trudeau government has announced it will impose dollar-for-dollar, retaliatory tariffs on metals and a range of other US products by July 1.
The Canadian lawmakers' solidarity came a day after White House trade adviser Peter Navarro said, "There is a special place in hell" for Trudeau for his "bad faith diplomacy" with Trump, as a dispute over trade escalated.
"It would be with regret but it would be with absolute clarity and firmness that we move forward with retaliatory measures on July 1, applying equivalent tariffs to the ones that the Americans have unjustly applied to us", said Trudeau.
Kudlow, in a separate TV appearance, said Trudeau was "polarizing" and "really kind of stabbed us in the back".More news: 'Fox & Friends' Anchor Freudian Slips, Calls Trump a 'Dictator'
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Mr Trump's advisers said the U.S. president believed he had been stabbed in the back by Mr Trudeau over United States tariffs.
Trump, who attended a G7 meeting in Quebec before heading to Singapore on Saturday, withdrew from a joint statement drafted by the global organization on trade. Addressing reporters in Singapore ahead of Trump's summit Tuesday with North Korean leader Kim Jong Un, Pompeo said he was "unconcerned" that Trump's treatment of Canada - a close ally - boded poorly for his ability to forge peace with a longtime USA adversary.
With politicians on both sides of the House supporting retaliation against penalties on Canadian steel and aluminum, John Ries, a professor with UBC's Sauder School of Business, says that might lead to US President Donald Trump backing off.
Since then, several Trump aides have publicly criticized Trudeau.
Trump said it "didn't look friendly" but it was "very friendly".
"We should review that in the context of a president who's clearly abusing the national security category as a justification for imposing tariffs", Welch said.
Tensions have been building between the two countries for months, as President Trump has targeted Canada as one of the many countries he sees as giving American the short end of the stick in trade deals. "We will act too", Merkel said. Yet the beauty of it was in the last line: " Our Tariffs are in response to his of 270% on dairy!".