Kudlow, the conservative economist who directs the National Economic Council, was upset with Trudeau's comments at a press conference after the contentious Group of 7 summit in Quebec.
Tweeted Collins: "We've had differences w/ Canada over the years, particularly regarding subsidies from the provincial & nat'l governments; nevertheless, Canada remains our close ally, good friend, & one of America's biggest trading partners". In a series of angry tweets, Trump called Trudeau "very dishonest and weak" and said the USA won't be taken advantage of.
Trump has pointed to Canadian Prime Minister Justin Trudeau's criticism of him as a reason for withdrawing from the consensus statement.
In London, Mayor Sadiq Khan said he hopes Trump will reconsider his trade policies.
Trump announced on Twitter he had made the decision following comments from Trudeau that Canada would move ahead with imposing retaliatory measures on the United States in response to newly imposed tariffs imposed by the U.S. on aluminum and steel.
Outside the Trump-Trudeau dustup, other G7 leaders also expressed displeasure with Trump's hardline approach.
- The Prime Minister's Office responds by saying Trudeau didn't say anything he didn't previously say in public and private conversations with Trump.
"As far as this retaliation goes, the American press needs to do a much better job of what the Canadians are getting ready to do because it's nothing short of an attack on our political system and it's nothing short of Canada trying to raise its high protectionist barriers even higher on things like maple syrup and other goods", he said.
By ordering his representatives to back out of the communique, Trump appeared to be asserting his oft-stated aim of upsetting the status quo, whether by pulling out of the global climate accord or the worldwide nuclear deal with Iran or threats to scrap the 1994 North American Free Trade Agreement between the United States, Canada and Mexico.
"That's what matters", he wrote.
"Kim must not see American weakness", Kudlow said.
"International cooperation can not be dictated by fits of anger and throwaway remarks", he said in a statement.
Reneging on the commitments agreed in the communique showed "incoherence and inconsistency", it said in a statement. "But we say that with great sadness".
"In a matter of seconds, you can destroy trust with 280 Twitter characters", German Foreign Minister Heiko Maas said when asked about Trump's U-turn.
While Trump also presented the idea that the member countries should drop off tariffs and trade barriers, he also reportedly complained to the other leaders about their trade policies and said the United States would continue with tariffs absent concessions.
James Brander, an worldwide trade expert at the University of British Columbia in Vancouver, said Freeland's comments were meaningful.
"We commit to modernize the WTO to make it more fair as soon as possible".
- Trudeau added that Trump "will continue to say what he says", but G7 countries made significant progress on matters of economy, female empowerment, environment and jobs.
"The European Union is brutal to the United States. $800 Billion Trade Deficit ..."
"That has meant the dismantling of multilateral agreements, the pulling out of the Paris climate change accords and the destabilisation of the Iran nuclear deal, and now the imposition of tariffs on steel and aluminium".