Some leaders from the Group of 20 major economies have expressed fears about the potential negative impact of a U.S.
Xi and Trump are scheduled to have a dinner on Saturday evening to talk about their trade differences and potentially call a ceasefire in the ongoing trade war between the two countries.
Trump recollected a deal with Macri's family to develop the West Side railroad yards - one of the "largest jobs in Manhattan", in Trump's telling. "There's some good signs", he said.
But on the eve of what is seen as the most important meeting of U.S. and Chinese leaders in years, both sides said differences remained, and the outcome of the talks were uncertain.
President Trump on Thursday announced he is canceling a planned meeting with Russian President Vladimir Putin during the G20 summit in Argentina on Saturday, but Ian Bremmer believes the two leaders will still meet over the weekend. Xi's administration also hopes talks will exclude or sideline key trade hawks, such as Trump adviser Peter Navarro.
The United States and China are locked in a dispute over their trade imbalance and Beijing's push to challenge American technological dominance.
Trump has accused China of rampant theft of United States technology and demanded that the emerging power end its requirements that foreign companies team up with local partners. If he can't get a deal with Xi, he's poised to more than double most of those tariffs January 1.
"China will continue to deepen market-oriented reform, protect property rights and intellectual property rights, encourage fair competition and do more to expand imports", he said.
As part of his negotiating tactics, Mr Trump has slapped hundreds of billions of dollars of tariffs on Chinese goods, sparking similar tariffs in response.
The G20 is made up of the world's 19 biggest economies and the European Union.
PM Lee talked about Singapore's interest in strengthening ties between both countries' Parliaments and deepening links with Argentina's provinces, particularly Buenos Aires and Santa Fe, two of its most significant provincial economies. Whether such a cease-fire would be enough to get Trump to delay higher or expanded tariffs is unclear.
Adding to the tensions is a new report from the US trade representative that accused Beijing of stepping up efforts to steal technology. In previous years, the G20's joint statement had been hammered out well in advance. In doing so, they cited the trade conflict as well as political uncertainty.
Putin jetted into Buenos Aires Friday morning, and the Kremlin said it "regrets" Trump's decision to scrap the meeting.
When he was elected in 2015, Mr Macri promised market-friendly reforms to get Argentina's isolated economy back on track.
He called the deal by its old name NAFTA, prodded Trump over USA steel and aluminum tariffs and said General Motors Co's decision to cut production and its North American workforce, including in Canada, was a "heavy blow". It is also the first to be held in South America.
A major issue that is hanging over the summit is the continued trade war between the USA and China.
But the cease-fire didn't last.
"So I really don't know", Trump said as he departed the White House on his way to Argentina for the G-20 Summit, where he will also have a working dinner with Xi.
Kudlow added that if the US doesn't get "satisfactory" responses to its trade positions more tariffs will be imposed.
"That was in my civilian days", Trump said.
"But. the suggestion that the path the United States is pursuing has a protectionist motivation, I think is false". "They're not going to abandon it lightly".