The statement was a declaration of shared values and goals by the seven countries - the United States, Canada, Britain, France, Italy, Germany and Japan - that attended.
Trump said he was retaliating against Canada with countervailing tariffs, saying of Trudeau: "He learned that's going to cost a lot of money for the people of Canada".
Immediately after his remarks Saturday, Trump blasted Trudeau's statement as "dishonest & weak" on Twitter and announced the United States would not be signing the joint G7 communique - a symbolic but unprecedented move. -Canada border. He said unleashing retaliatory measures "is not something I relish doing" but that he wouldn't hesitate to do so because "I will always protect Canadian workers and Canadian interests".
"Canadians are polite and reasonable but we will also not be pushed around", he said.
Canada's dollar for dollar counter duties are set to kick in July 1.
Since then, several Trump aides have publicly criticized Trudeau.
So what exactly is Canada's threat to the U.S.? Many others want him to hang tough even as Trump seeks to make political hay with his anti-Canada rhetoric.
The only hint of a softening came when Peter Navarro, the White House economic advisor, apologized for saying there was a "special place in hell" for Trudeau.
"Let me correct a mistake I made", Navarro said at a Wall Street Journal conference, according to video provided by the Journal's CFO Network.
If the USA does not remove its tariffs on Canadian products, Canada says it will retaliate with tariffs on $264 million of Minnesota products, including taconite, auto parts and packaged foods.
"That co-operation to reduce costs, find efficiencies and open up trading within our own region will benefit not just small and medium enterprises, but the region overall", Bell said.
Dias said auto industry bosses won't sit idly by if Trump hurts their bottom lines by choking off the supply of components before American ones are built.
While other presidents and prime ministers have had testy relations - president Richard Nixon famously used a profane word, behind closed doors, to refer to Trudeau's father Pierre Trudeau, also in the context of trade talks - neither side has demonstrated this level of animosity since John Diefenbaker feuded with John F. Kennedy in the early 1960s.
It is unfortunate that there is now "so little trust" in this most important relationship, commented University of Montreal professor Frederic Merand.
Freeland added that the action is illegal under World Trade Organization and NAFTA rules, that Canada has raised cases in both tribunals with the backing of the European Union and Mexico, and that "the United States, in fact, has a surplus of trade in steel with Canada".
Vacationers said they would be staying up north this summer instead of booking trips to the US.
"Meaningful progress has been made today, and we need to keep working hard to get to a deal on a modernized NAFTA", Freeland said to reporters following her meeting with USA trade representative Robert Lighthizer.
The U.S. has initiated an investigation to determine if automobile imports threaten to impair national security.