Yet after leaving the summit, Trump tweeted that he would instruct USA officials not to endorse the G-7 statement, after objecting to comments from summit host Trudeau.
In recent weeks, Trump has criticized Canada's trade policies and Trudeau himself on Twitter.
"There's a special place in Hell for any foreign leader that engages in bad faith diplomacy with President Donald J. Trump and then tries to stab him in the back on the way out the door", Navarro said.
New Italian Prime Minster Giuseppe Conte however opted to support Trump, tweeted approval of his suggestion by stating that, "Russia should re-enter the G8".
He said Trump "did the courtesy to Justin Trudeau to travel up to Quebec for that summit".
Donald Trump and Justin Trudeau have been at loggerheads over trade tariffs
Trudeau told the president that Canadians did not take it lightly that the US has moved forward with significant tariffs on their steel and aluminum industry.
"Is that really how we want to deal with our second biggest trading partner?"
Kudlow lashed out at Trudeau first during an appearance on CNN's "State of the Union".
Amidst the furor of new trade tensions with the U.S.'s G7 partners, President Donald Trump let slip the latest in a series of criticisms leveled at former President Barack Obama for allegedly allowing Russian Federation to invade Ukraine.
The president warned America would win any trade war if they tried to retaliate against new tariffs on imported steel and aluminum.
This Technology Can Suck Carbon Dioxide From Air, Transform It Into Fuel
The liquid goes through a series of steps that include freezing it into pellets and then transforming it into a slurry. While the process requires a lot of electricity, the pilot plant in Squamish uses renewable hydro power.
In a tweet posted Saturday evening, Trump said his decision was based on "false statements" made by Trudeau during a press conference he gave, as well as "the fact that Canada is charging massive Tariffs" on US companies.
Trump's change of heart appeared to have been invoked by Trudeau's comments on Trump's steel and aluminum tariffs against Canada and other allies.
Despite the tensions at the gathering in Canada, Mr Trump rated his relationship with their leaders as a "10" - naming Germany's Angela Merkel, French president Emmanuel Macron and Canada's Justin Trudeau, but not the UK's Prime Minister.
Trudeau had said Canadians "are polite, we're reasonable, but also we will not be pushed around". "The Prime Minister said nothing he hasn't said before - both in public, and in private conversations with the President", the office added.
Mr. Kudlow said Mr. Trudeau "busted up" the G-7 summit with his remarks - even if they were designed for domestic consumption in Canada, and though Mr. Trump is known for making strident comments in other settings.
"I highlighted that it was not helping in our renegotiation of NAFTA and that it would be with regret but it would be with absolute certainty and firmness that we move forward with retaliatory measures on July 1st, applying equivalent tariffs to the ones that the Americans have unjustly applied to us", Trudeau told reporters.
Trump disrupts gender equality meeting at G-7 summit by arriving late
Trump himself told reporters on Saturday that the summit was not contentious and called his relationship with G7 allies a "10". European officials said Trump had tried to water down the language in the draft communique on the WTO and rules-based trade.
Russian Federation was kicked out of the group in response to its 2014 annexation of Crimea.
A German government spokesman said that his country "stands behind the communique which was collectively agreed upon".
In much of the European press, the tendency was to underscore the historical significance of the rift between the United States and its continental allies.
The G7 countries, in the communique, "acknowledge free, fair, and mutually beneficial trade is a key engine for growth and jobs", and commits these nations to modernize the World Trade Organization (WTO).
UFC 225: Twitter Reacts To Colby Covington-Rafael Dos Anjos
Dos Anjos barely catches Covington with a knee strike before getting taken down, Dos Anjos gets up and separates from Covington. Covington's most recent performance - a three-round decision over Demian Maia - was arguably one of his ugliest in the UFC.