The president alluded to the surprise during the press conference. "Trade", Trump wrote in a pair of tweets. "What was strong was the language that this can not go on, but the relationships are very good".
We probably don't need to tell you this, but the reality TV show judge and Fresh Prince of Bel Air guest-star appears to be a bit of a pain in the arse at meetings like this. "We're like the piggy bank that everybody is robbing and that ends". But the leaders are saying they're committed to continuing the dialogue and continuing to work on this matter. "I blame our past leaders".
The noise of Trump's helicopter landing was so loud they had to stop talking for a while, in a scene one official compared to the opening from the U.S. television series MASH. "They have no choice".
As Toronto Star reporter Daniel Dale observed, Trump spent much of the G7 summit "painting a highly inaccurate tariff picture-wrongly suggesting everyone else has high tariffs while US has none".
On Saturday, Mr Trump arrived late for the first working session on gender equality but Canadian Prime Minister Justin Trudeau forged ahead with opening remarks without him, commenting wryly about "stragglers".
Mr Trump had earlier signed the joint statement agreed by all the G7 nations despite the trade row.
"We'll win that war 1,000 times out of a 1,000", he said. "And that ends." - Trump insists that the current status quo on trade can not be allowed to continue. "We're not looking to play games", Trump said. I think it would be good for the world. "It's in everyone's interests". He also made controversial comments to reporters calling for Russian Federation, which had been kicked out of the G8 in 2014 over its Crimea invasion, to have its membership reinstated.
"If they retaliate, they're making a mistake", he warned, insisting that the United States has much less to lose than its partners in the event of world trade breaking down. They can't believe they got away with it [for so long].
"President Trump is targeting the dairy sector because he wants to dump US dairy into Canada", Lampron told The Canadian Press, adding that Canada imports five times more dairy from the USA than it exports.
G7 participants were also angered by Trump's stance on climate climate - a key issue on the group's agenda.
The US president did not appear to be listening during some of the trade presentations, another G7 official familiar with the meeting said.
During the summit, other security threats were addressed including the threat of Iran.
While the G7 chiefs have largely praised Trump for his efforts to stabilise the Korean peninsula, they are unhappy he pulled out of an worldwide agreement created to limit Iran's nuclear ambitions. "Those ambitions are going to be controlled along with efforts to combat terrorism and extremism and those who spread this deadly ideology", Trump said.