The US sees it differently.
Rising trade tensions between Canada and the U.S. threaten to drive the key allies apart.
The "world trade system is a mess", Mr. Trump's top economic adviser, Lawrence Kudlow, said on Wednesday.
His private meeting with Macron, he said, "will be an opportunity to talk about the relations between Canada and France that are going very well, but also to highlight the challenges that we are going to have around the G7 table, and to make sure we are aligned". On other occasions, he has accused the country of being "very rough" as it has "taken advantage" of the United States and "outsmarted our politicians for many years". "We have extremely low expectations". "The president is at ease with all of these tough issues".
"It is simply ridiculous to view any trade with Canada as a national security threat to the US", Mr Trudeau has said of the move.
Asked if the administration will respect decisions from the World Trade Organization on tariffs, Kudlow said that "international multilateral organizations are not going to determine American policy".
The G-7 groups Canada, France, Germany, Italy, Japan, the United Kingdom, and the United States.
Trump's surprise tariffs forced Canadian officials to adopt more blunt language while NAFTA talks between the U.S., Canada and Mexico continue.
Freeland suggested the tense phone call doesn't reflect the nature of Trudeau and Trump's relationship. America First is a fine political slogan, but not a formula for multilateral progress on compliance with worldwide norms.
Canada is hosting the two-day G7 summit of the world's wealthiest nations beginning Friday in Quebec, and Trump is expected to come under fire for imposing tariffs on American allies.
President Trump is trying to restructure USA trading relations with all major trading partners at one time, but paying no heed to the institutions and diplomatic etiquette that leaders normally use when dealing with their peers, Mr Rod Hunter, a partner at the worldwide law firm Baker McKenzie, told The Straits Times.
At the same time, the United States was suffering under the economic repercussions of its declaration of independence in 1776.
"We may have tactical disagreements, but he has always said - and I agree - tariffs are a tool in that effort". Moreover, leaders of democratic countries have their own politics. Trump later said he "had no idea" whether the claim was true. More than 40 environmental groups are urging the G-7 to sign a charter aiming to reduce the use of plastics.
"I think it's fair to expect that any discussions on the global economy.in the current environment will quickly turn into a discussion about trade", a senior Canadian official said.
Nevertheless, the War of 1812 remains the last full-scale conflict that pitted Canadian against American, and it remains a point of contention between both countries.
"It will be the most dysfunctional G-7 meeting - by a long margin - since its first in 1975".
Coming on top of Brexit, a broader weakening of Europe, the rise of China and its creation of new architecture, and Russia's willingness to undermine the U.S., under the Trump administration the US-led order has "crumbled more quickly than it otherwise would have", Mr Bremmer said.