"Based on Justin's false statements at his news conference, and the fact that Canada is charging massive Tariffs to our U.S. farmers, workers and companies, I have instructed our U.S. Reps not to endorse the Communique", Trump wrote.
The European Union on Monday backed Canadian Prime Minister Justin Trudeau after US President Donald J. Trump branded the youthful and popular Trudeau as "dishonest" and "weak" following the G7 meeting.
On Friday, he faced our angry allies at the G-7 conference in Quebec, a face-to-face battle in what could become a destructive trade war. Addressing reporters in Singapore ahead of Trump's summit Tuesday with North Korean leader Kim Jong Un, Pompeo said he was "unconcerned" that Trump's treatment of Canada - a close ally - boded poorly for his ability to forge peace with a longtime US adversary.
Trump pulled out of endorsing a joint communique after the G7 meet finished on Saturday with the U.S. president accusing Trudeau, the summit's chairman, of dishonesty.
Kudlow alleged that the Canadian Prime Minister used the G-7 summit for his domestic political consumption.
She also said the European Union would "act" against the USA trade measures. "I don't understand the obsession with trade relations with Canada", he said on Fox News, given that Canada is the biggest single buyer of American goods and services in the world. Freeland later told reporters that "we don't think that's a useful or productive way to do business".
US President Donald Trump has renewed his attacks on America's closest allies following the divisive G7 summit in Canada at the weekend.
France and Europe are standing by the G7 communique, a French presidency official said, adding anyone departing from the commitments made at the summit would be showing their "incoherence and inconsistency".
Freeland reiterated Canada will retaliate to USA tariffs in a measured and reciprocal way, adding Canada will always be willing to talk.
The US president left the summit first, bound for Singapore and a historic summit with North Korea's Kim Jong Un, after warning the other G7 leaders that trade between their countries must be better balanced or halt altogether.
"I know it didn't look friendly", Trump said.
"In a matter of seconds, you can destroy trust with 280 Twitter characters", German Foreign Minister Heiko Maas said when asked about Mr Trump's U-turn, adding it would take much longer to rebuild lost trust. Nearly 70 percent of the steel used in the United States already is produced here, and our nation can never be self-sufficient in aluminum production because the bauxite used to make the metal is not mined here.
Speaking to the House of Commons, May said the other G-7 nations "expressed deep disappointment at the unjustified decision of the United States to apply tariffs to steel and aluminum imports" and urged dialogue to avoid "tit-for-tat escalation". It came in sharp contrast to a roar of disapproval among Canadian politicians, who banded together across party lines to denounce Trump's attack and praise the bilateral and trading relationship between the two neighbors.