Before his departure from Canada the previous day, he tweeted: "Based on Justin's false statements at his news conference, and the fact that Canada is charging massive Tariffs to our US farmers, workers and companies, I have instructed our US Reps not to endorse the Communique as we look at Tariffs on automobiles flooding the US Market!" Not long after Trump issued two tweets calling Trudeau "very dishonest & weak".
In his news conference, Mr Trudeau had spoken of retaliatory measures that Canada would take next month in response to Mr Trump's decision to slap tariffs on steel and aluminium imports.
Kudlow was particularly offended that Trudeau would say this ahead of Trump's North Korean summit.
On Tuesday, Trump kept up the attack on Trudeau.
Prime Minister Justin Trudeau's government is in talks to save the deal and, in concert with the other major trading powers in the G7 group of nations that met in Quebec over the weekend, pushed back against Trump. Minimum is 17B. Tax Dairy from us at 270%.
And German Foreign Minister Heiko Maas tweeted Sunday that Trump had partly "destroyed" Washington's trusting relationship with Europe by pulling out of the joint communique.
Chief trade adviser Peter Navarro said there's "a special place in hell" for Trudeau and anyone else who negotiates in "bad faith" with Trump.
Trump went on to say that the United States gets "unfairly clobbered" on trade despite "protecting Europe at great financial loss". Meanwhile on CNN Larry Kudlow said Trudeau "stabbed us in the back".
Mr Trudeau and the European Union have vowed to take retaliatory action next month over U.S. tariffs on steel and aluminium. The French presidency had earlier condemned "fits of anger".
European Commission President Jean-Claude Juncker is set to debrief Commissioners about the G7 and underline the commitment made by the EU in the communiqué to "continue to stand up for an worldwide rules-based multilateral system. He learned", Trump said wagging his finger.
Hours after Mr Trump withdrew his support for the joint statement and attacked Mr Trudeau, Mr Kudlow and trade adviser Peter Navarro drove the message home on Sunday morning news shows in an extraordinary assault on a close United States ally and neighbour. "They're gonna do what they can to defend and protect their country, just like we're trying to do the same thing with ours".
On 1 June, the U.S. imposed a 25% tariff for steel and 10% for aluminium on imports from the European Union (EU), Canada, and Mexico.
"Congressmen, politicians, people, you know realizing this is a bad thing-maybe that message will get to Donald Trump and we can hope he'll listen, although one might not be very confident that he'll listen to reason". In the end, that language stayed in and it was only on climate change that no consensus was reached.