Wendy Cutler, a former U.S. trade negotiator now at the Asia Society institute in the United States, said the best to expect at the G20 would be a "ceasefire" as both sides agree to go back to talks.
"The fact that the G20 is taking place in South America for the first time is nearly beside the point", Mr Shifter said.
"In the last few years, current multilateral mechanisms, including the G-20, have come under fire because of social, political and economic shifts within each country and across the globe", said Mr Macri at the opening of the summit, which Argentina is hosting as this year's G-20 president. Another official said Mr. Navarro's addition was meant to send a message to China about the administration's resolve on trade.
Mr Macron also called for global involvement and "complete clarity" in investigations into the killing of dissident Saudi journalist Jamal Khashoggi, and said European leaders should discuss it at a meeting Friday. He was initially scheduled to hold a bilateral meeting with Russian President Vladimir Putin, but canceled it on Thursday, citing Russian aggression against Ukraine.
Saudi Arabia has denied that bin Salman played a role, but some leaders may be cool toward him to avoid seeming to legitimize a man who USA intelligence agencies concluded ordered the killing.
It is to be the crown prince's first significant appearance overseas since the killing.
German Chancellor Angela Merkel said: "Everyone agrees that the WTO should be reformed".
Failure to reach a deal could see Chinese export growth weaken in the coming months, Goldman said.
Trump, recently unnerved by shaky United States markets and the closure announcement of General Motors factories in OH, has appeared more open to a trade breakthrough with China in the last several days, according to people who have spoken to him.
"Just getting to know each other and so far so good, I think it's going to be a great relationship", Trump said in the meeting in Buenos Aires. But Trump said he will go ahead with a dinner in the evening with Chinese President Xi Jinping.
So an unorthodox solution emerged: Because of resistance from the Trump administration, an official in the French president's office said the statement may have language that sets the US apart.
Shannon O'Neil, an expert on global trade at the Council on Foreign Relations, said she believes it "very likely" that the tariffs will take effect in January.
However the USA trade representative, Robert Lighthizer, said he would be surprised if Mr Trump's working dinner with Mr Xi "wasn't a success".
Such a statement would endorse the Paris Agreement on climate change, repeating one issued at last year's G20 in defiance of Trump, who has yanked the United States out of the pact despite increasingly urgent warnings from scientists in advance of a UN climate meeting starting in Poland next week.
However, questions about whether Trump's real motive was to avoid embarrassment about a deepening probe back home over improper links to Russian Federation would not die down.
"I hope they understand that", he said.
"These agreements are massive, and a vast number of technical details need to be scrubbed and wrapped up", she said.
"Even though the agenda that brings us together today is different, I'd like to ask you to act with the same sense of urgency that brought us together in 2008". He congratulated Trump on his historic midterm election victory and remarked, "The alliance between Japan and the United States has become more robust than ever".
"I think the worst of it is that the conflict between China and the U.S.is again showing the limits of multilateral institutions, in particular the World Trade Organization", Roberto Bouzas, an global relations and economics professor at the Universidad de San Andres, tells VOA.More news: Players hurt by glass and gas in 'disgraceful' bus attack
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