Shortly after Mr. Trudeau said that he was "happy to announce that we have released a joint communique by all seven countries" indicating that the U.S. was also included, Mr. Trump announced that Washington would reverse its decision and not sign the statement.
Trump showed no sign of backing down on Friday, after earlier accusing both France and Canada of imposing massive tariffs on USA goods and then accusing Canadian Prime Minister Justin Trudeau of "being so indignant".
Trump said he hasn't talked with Putin for some time and justified his proposal because the reincorporation would be good for the world, for Russian Federation, for the United States and for the G7 countries.
And Roland Paris, a former foreign policy adviser to Trudeau, jabbed at Trump on Twitter: "Big tough guy once he's back on his airplane".
In an appearance on CNN's "State of the Union," Kudlow argued that Trudeau's critique amounted to a betrayal of the G7, as well as the U.S.
"If they retaliate, they're making a mistake", Mr. Trump said.
Trudeau said he would continue to stand up for Canadian dairy producers and the country's supply management system.
May 31 - The Trump administration announces that Canada will no longer be exempt from steel and aluminum tariffs, prompting the Trudeau government to announce its own counter-measures.
"We strive to reduce tariff barriers, non-tariff barriers and subsidies", the G-7 nations said in their joint communique issued at the conclusion of the two-day summit in Canada.
Timeline of trade tensions since the US decision to impose tariffs on steel and aluminium imports
The US President gave a press conference at the seat of the summit in the Canadian town of La Malbaie shortly before he left the meeting to head for Singapore, where on June 12 he will meet with North Korean leader Kim Jong-un, Efe reported.
A divisive summit in Canada at the weekend ended with U.S. President Donald Trump firing off a volley of tweets, venting anger against North Atlantic Treaty Organisation allies, the European Union and Canadian Prime Minister Justin Trudeau.
White House economic adviser Larry Kudlow and Canadian Prime Minister Justin Trudeau.
Trudeau said he and Trump have disagreed over Trump's call for Canada to open up its supply management system, which protects dairy, poultry and eggs farmers, during the hard ongoing renegotiation of the North American Free Trade Agreement.
So there you have it. Justin Trudeau's eyebrows are just fine, thanks.
In response, the Canadian official replied that "the prime minister and the president have very frank, direct, candid, honest conversations".
"He really kind of stabbed us in the back", he said.
President of the European Council Donald Tusk said that "There is a special place in heaven for Justin Trudeau".
Justin Trudeau's stance was solid and clear!
U.S. Justice's ACA decision is latest of many shifts
Health insurers are now deciding whether to sell coverage in the individual market in 2019 - and what they're going to charge. In that, lawmakers chose to eliminate the tax penalty the ACA requires people to pay if they flout the insurance mandate.