In his interview Sunday, Kudlow accused Trudeau of making his comments for "domestic political consumption" and doing "a great disservice to the whole G7".
The official North Korean news agency said Sunday Kim is prepared to talk about "denuclearization" and a "durable peace".
Unbowed, Trump tweeted anew Monday morning from Singapore, repeating his criticism of USA trade policies with Canada - he also took aim at Germany - in a multi-tweet rant that went beyond 200 words all told.
With diplomatic tensions between USA and Canada rocked by recent comments about trade by president Donald Trump and his advisers, some Americans are finding ways to acknowledge Canada's other exports in popular culture.
Trump in his tweet said Trudeau had "acted so meek and mild during our @G7 meetings only to give a news conference after I left saying that. he 'will not be pushed around.' Very dishonest & weak".
Before he was elected Canadian prime minister, Justin Trudeau faced a consistent type of criticism from his opponents: he was too young and too eager to please, conservatives said. "They're also anxious about the retaliatory measures that we will take". And much is being made of a photograph showing Trump and Japanese prime minister Shinzo Abe with their arms crossed as German chancellor Angela Merkel and French president Emmanuel Macron lean on a table between them and Trump, seemingly trying to convince him of something.
"Canada does not conduct its diplomacy through ad hominem attacks ... and we refrain particularly from ad hominem attacks when it comes from a close ally", Ms Freeland told reporters in Quebec City on Sunday.
"Donald Trump has dealt a further heavy blow to the Western community of states with his behavior after the G-7 summit", said Johann Wadephul, a deputy caucus leader of Merkel's bloc.
"That's what matters", he wrote. "Kim must not see American weakness".
French President Emmanuel Macron's office reacted Sunday by saying that "international cooperation can not be dictated by fits of anger and throwaway remarks".
The Charlevoix G-7 summit was marked by sharp disagreements over Trump's decision to impose higher import taxes on aluminum and steel imports. Trump said in a second tweet.
The barbs continue to fly from the Trump administration - as it presses the case that Canadian trade policy is hurting the United States. Joint ideas and compromises on trade and joint ideas and compromises to strengthen the bonds between the world's top industrialized nations. "We make commitments and keep them". "Our Tariffs are in response to his of 270% on dairy!"
The United States on the other hand offered a separate paragraph promoting fossil fuels.
"Look, as a guy that believes in heaven and hell, I would never use those terms ever", he told CNN's Kate Bolduan on "At This Hour" on Monday. "You know, it's like the gig is up".
According to the U.S. trade representative, however, there was an $8.4 billion United States trade surplus with Canada on goods and services in 2017. Senator John McCain responded to these tweets by supposedly speaking for the American people and saying that the country stands with the rest of the G7 countries, even if President Trump does not.
James Brander, an worldwide trade expert at the University of British Columbia in Vancouver, said Freeland's comments were meaningful.