Shortly after its release, Trump attacked Trudeau on Twitter over what he described as the prime minister's "false statements" during the closing G7 news conference - and the president announced the USA would no longer sign on.
Trump also tweeted that Trudeau had acted "so meek and mild" during their meetings and that his tough talk later is "dishonest & weak".
President Trump arrives at Paya Lebar Air Base for a summit with North Korean leader Kim Jong Un, Sunday, June 10, in Singapore. But I feel really confident", Trump said of Monday's meeting, which is the first between a North Korean leader and sitting USA president, "It's never been done, It's never been tested.
Just as the Trudeau-hosted Group of Seven meeting of the world's leading industrialized nations had seemed to weather Trump's threats of a trade war, the president backed out of the group's joint statement that Trudeau said all the leaders had come together to sign.
But when Trudeau said Canada would be forced to retaliate for USA tariffs on steel and aluminum and would not agree to a sunset provision in a new North American Free Trade Agreement, "he really kind of stabbed us in the back", Kudlow said.
Trudeau told reporters that Canada would move forward on July 1 with retaliatory tariffs to answer for Trump's tariffs on aluminum and steel that were "unjustly applied to us".
About that meeting, Trump said "within the first minute, I'll know" whether the North Korean leader wants to negotiate seriously with the US. "Angela (Merkel) and Emmanuel (Macron) and Justin (Trudeau) - I would say the relationship is a 10".
Navarro calls that a "socialist communique" that Trump pulled out of.
President Trump delivers warning on trade as he leaves G-7 summit
Trump has made "America First" an unofficial slogan for his administration. The language, however, was strong, he added.
Peter Navarro tells "Fox News Sunday" that's what Trudeau did to Trump at the end of the Group of Seven nations meeting in Canada over the weekend.
He sent a tweet that suggested he stands by the G7 communique despite the president's second thoughts.
"We urge Russian Federation to cease its destabilising behaviour, to undermine democratic systems and its support of the Syrian regime", said a joint statement issued at the end of a summit in Canada.
"In terms of the approach that governments choose to take, Canada does not believe that ad-hominem attacks are a particularly appropriate or useful way to conduct our relations with other countries", she said. He will miss the climate session of the G7 summit.
"It's a betrayal, essentially a double-crossing", Kudlow said.
He insisted, like Trump himself has done many times, that Canada has enormous tariffs itself - especially on certain dairy and food products. John McCain and ex-FBI director James Comey - who Trump unceremoniously fired past year - took to Twitter to offer their support. Lindsey Graham, R-S.C., also called Trudeau's comments a stab in the back to Trump.
"I think it would be an asset to have Russian Federation back in. Canada, thank you for the ideal organization of G7!"