"Justin's [Trudeau] 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 as we look at Tariffs on automobiles flooding the U.S. Market!" he noted.
At a news conference to close the summit of world leaders in Canada, Mr Trudeau said the people of his country would see the USA president's line on trade as "an insult" after a long history of cooperation between the countries.
Canadian Prime Minister Justin Trudeau called USA metal tariffs "insulting" and announced retaliatory measures.
At a gathering of governors of all the states at the White House, Trump said: "Now, the prime minister, who I think is a fantastic man, called me the other day and said we are lowering it to 50%".
According to BBC, Canada, the U.S., the U.K., France, Italy, Japan, and Germany agreed on "free, fair, and mutually beneficial trade", as well as, the importance to fight protectionism.
As for the prospect of new trade deals touted by the Trump administration, Alden says they are a pipe dream.
On trade, at one point it seemed as though Mr Trump was in search of some sort of grand bargain, as he called for the end of all subsidies, tariffs and non-tariff barriers to trade. "I think it would be good to have Russian Federation back in".
Trudeau also took a jab at President Trump, who arrived late for a gender equality meeting. They found just the right wording to secure American agreement on matters that never used to be in question, such as supporting democracy, abiding by international-trade rules and fighting terrorism. In that black-and-white photo, posted by US Press Secretary Sarah Sanders, Mr Trump appears to talk confidently as other leaders listen.
It is an annual summit bringing together Canada, the USA, the UK, France, Italy, Japan and Germany, which represent more than 60% of global net worth between them.
"The United States has been taken advantage of for decades and decades", he continued, describing America as a "piggy bank that everyone keeps robbing". The president said that the level of the relationship with the G7 leaders "is a 10".
After the conclusion of the summit, Trump said the United States has "put up with trade abuse for many decades - and that is long enough".
The letter comes on the day of the Group of 7 (G-7) summit amid heightened conflict between Trump and other G-7 members over the tariffs and following Trump's suggestion that Russian Federation be reinstated into the group.
Over the course of the summit, the President pushed the narrative that the U.S.is a victim of a trade imbalance, though European leaders rejected these claims. Tellingly, the desk in front of Mr Trump was bare.
Internationally, one European diplomat says the rest of the G7 will carry on despite the president's online attack against Trudeau and his decision to pull out of the final G7 communique.
Trump is not the first politician to make the realpolitik argument that Russian Federation belongs at the G7 table, but his position is a complete turnabout from the Obama Administration, which condemned the 2014 annexation and imposed sanctions on Russian Federation as punishment.
She said: "If there are to be any conversations about Russia's future in relation to this particular group, they have to change their ways, they have to change the route that they are taking and the sort of activity they are involved in".
"I wasn't sure - he said it so beautifully".