At this second G-7 gathering of Trump's presidency, the question of whether the US leader would follow through on campaign boasts about punishing worldwide freeloaders has been largely answered.
Europe's answer must be to stick even closer together, defend its interests and strengthen alliances with countries such as Japan and Canada, Maas said.
The U.S. president left before the end of the summit and will fly to Singapore for a meeting with North Korean leader Kim Jong Un, which he described as a "mission of peace".
Disagreement over the sunset clause was the deal breaker that scuttled a possible meeting between Trump and Prime Minister Justin Trudeau in Washington late last month in an attempt to bring the NAFTA talks to a conclusion. "Kim must not see American weakness".
Trump calls off Eagles' White House visit over anthem dispute
US President Donald Trump participates in the "Celebration of America" at the White House in Washington , DC, on June 5, 2018 . The president said Tuesday on the South Lawn that it's time to "explain why young Americans stand for our national anthem".
Trudeau didn't respond to questions about Trump when the prime minister arrived at a Quebec City hotel Sunday for meetings with other world leaders, though Freeland later told reporters that "we don't think that's a useful or productive way to do business".
"We are focused on everything we accomplished here at the #G7 summit". Can't do it in person.
He also denied the summit had been contentious, a remark that contradicted what one G7 official described as an "extraordinary" exchange on Friday in which Trump repeated a list of trade grievances, mainly concerning the European Union and Canada.
Kudlow said the U.S. had spent the summit negotiating in "good faith" with Trudeau and the other assembled leaders, and that the USA had planned to sign the communique until Trudeau's news conference, which Kudlow called a "sophomoric play".
Trudeau's view of how the summit went was a marked contrast to Trump's take. He had other things, bigger things, on his plate in Singapore.
He sent a tweet that suggested he stands by the G7 communique despite the president's second thoughts. Trump said he had not spoken with Russian President Vladimir Putin in a while. He said Trudeau - whom at one point he said "staged" a "sophomoric political stunt for domestic consumption" and should apologize.
Trump barrels into G-7 summit, ready to fight United States allies
President Donald Trump during the official welcoming ceremony on Friday. "The rules-based global order is being challenged", Mr. You know, whether you like it or not, and it may not be politically correct, but we have a world to run.
Trudeau had made the issue of gender equality a priority for the gathering. "I would say the relationship is a 10", he said, referring to leaders from Germany, France, and Canada, respectively. From promoting democracy and to fighting terrorism, "we're on the same page".
German Chancellor Angela Merkel said she agreed with Trump's push for a freer trade, adding talks over crucial changes to global trading rules will keep moving ahead. I mean, we have India, where some of the tariffs are 100%. "Our Tariffs are in response to his of 270 per cent dairy!"
But Trump's outburst suggested that any deal had collapsed, and his more or less explicit threat to impose sanctions on imports of cars will outrage his ostensible allies - in particular Germany and Canada who produce many for the large United States market. "If they retaliate, they're making a mistake", Trump declared.
Trump left the summit on Saturday before it discussed climate change and the health of oceans.
The president says the USA is "pretty close" to an agreement on the North American Free Trade Agreement (NAFTA) and discussing two types of sunset provisions in which any of the countries could leave the deal.
Trump Feuds With Leaders of France, Canada Before Summit
President Donald Trump take part in a joint press conference at the White House in Washington , D.C., on February 13, 2017. But Trump took to Twitter earlier today to signal he's got his elbows up in advance of his Canadian debut in Quebec.