The insults stemmed from a closing G7 press conference on Saturday in which Trudeau called U.S. steel and aluminum tariffs "insulting" and pledged to proceed with previously announced retaliatory tariffs.
Based on Justin's false statements at his news conference, and the fact that Canada is charging massive Tariffs to our U.S. farmers, workers and companies, I have instructed our U.S. Reps not to endorse the Communique as we look at Tariffs on automobiles flooding the U.S. Market!
The admission was a rare act of contrition from the Trump White House, where public apologies are few.
Days later, Trump said that he had left the summit at that stage and was aboard Air Force One en route to Singapore when Trudeau gave the press conference.
"We finished the meeting, really everybody was happy, and I agreed to sign something", Mr Trump said.
Trump's top economic adviser, Larry Kudlow, suggested that Trump saw Trudeau as trying to weaken his hand before the summit with Kim.
Chief Economic Advisor Larry Kudlow said it is unclear if the US will be able to renegotiate NAFTA amid heightened tensions with Canada.
At the event, Mr Trudeau said Canada would take retaliatory steps in response to Mr Trump's steel and aluminium tariffs imposed on Canada and other allies.
Navarro, a supporter of tariffs to help reduce the United States trade deficit and a longtime critic of China, turned his anger at Canada over the weekend as a Group of Seven meeting hosted by Trudeau ended in disarray and trade threats.
The Republican Corker has criticised Trump for attacking a vital ally, and lashed out at leaders in his own party for refusing to schedule a vote on his measure to let Congress approve or reject any tariffs imposed by the United States president. Trudeau's comments centered around Trump's lack of understanding when it comes to global trade.
"Canada is not a country that we have trade issues with", Corker said.
The Consul-General of Canada Phyllis Yaffee was in Harrisburg this week as part of an effort to work on trade between Canada and Pennsylvania.
As we've argued elsewhere, Trump appears to be targeting allies as a means of rupturing their mindset-convincing them that they are no longer deserving of American coddling just because of their geopolitical status. "And frankly, I think that's out of line", Senate Finance Committee chairman Orrin Hatch, a Utah Republican, told reporters. "He learned", Trump said wagging his finger.
Trump, meanwhile, renewed his criticisms of Canada's protection of its dairy sector, saying: "It's very unfair to our farmers, and it's very unfair to the people of our country".