As the New York Times reported, it was unclear if the president was trying to make a joke during the phone call that came after fresh tariffs were imposed by the Trump administration targeting steel and aluminum imports coming from Canada.
When Trudeau won power, the bedrock of his foreign policy was to return Canada to its traditional multilateral leanings - support for institutions created after the Second World War such as the United Nations, NATO, the G7 and the worldwide trading order. "Maybe, but nobody is forever", when flanked by Canadian Prime Minister Justin Trudeau.
"There are disagreements. He's sticking to his guns".
He would have a "useful" and "frank" exchange with Mr Trump at the G7 summit in Canada tomorrow and Saturday about both issues.
"The six countries of the G-7 without the United States, are a bigger market taken together than the American market".
The Mexican tariffs target US pork, produce, bourbon, and steel - products chosen with a political objective in mind.
The European Union has opened a World Trade Organization case.
Trudeau called it "inconceivable" that national security concerns could be a legitimate reason to impose the tariffs during a press conference last week and said it was "an affront" to Canada, whose soldiers have fought and died alongside Americans in several worldwide conflicts.
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"We think that demonstrating the strength of NAFTA as a solid community as we take on the world is very much in all 3 of our advantages and we'll continue to negotiate that way".
Two Canadian-based sources said divisions between the United States and other G7 members were so great that senior officials in charge of each nation's preparations planned to hold an unusual additional meeting tonight in a bid to find consensus.
Trudeau and Trump may lock horns again in La Malbaie, Que., where the prime minister will host the G7 summit June 8 and 9. In French, she said the two are real friends.
The tariffs will make those USA products more expensive for Mexican consumers.
The reports do not say what types of penalties are being looked at.
The new tariffs imposed by Mexico on steel imports are significant for the USA, the biggest supplier to the country, providing over a third of all steel goods imported into Mexico, a net importer of steel products. European allies have urged Trump to reconsider.