French President Emmanuel Macron this week said there was no better way of negotiating an end to the conflict than through the Minsk agreements brokered by France, Germany, Russia and Ukraine.
"We have seen resilience levels raise instantly as society recognizes being targeted", he said.
Russian Foreign Minister Sergei Lavrov said on June 28 that he assumed the Trump-Putin meeting would take place on the sidelines of the G20 summit.
News of the meeting comes amid three ongoing US investigations into potential electoral interference by the Kremlin, and accusations of collusion against the president.
The United States backs rebel groups trying to overthrow Assad, and Washington angered Russian Federation by launching missile strikes against a Syrian government air base in April in response to what the United States says was a chemical weapons attack that killed dozens of civilians. "It's whatever the president wants to talk about". Not to mention Russia's alleged involvement and collusion in the 2016 presidential election.
Mr McMaster and economic adviser Gary Cohn would not say whether President Trump intends to address accusations that Russian Federation interfered in the 2016 presidential election, saying the agenda is "not finalised" for this or for any other meeting.
The top Democrat on the House intelligence committee said that if President Donald Trump doesn't act on the threat Russian Federation poses, he could be derelict in his duty to protect the United States.
Stelzenmueller added that North Atlantic Treaty Organisation and the European Union "are experiencing a renaissance of purpose" and said the upcoming September elections in Germany are "now looking quite different" compared to the beginning of the year, with Chancellor Angela Merkel holding a lead in the polls.
But Lavrov added that it would "probably not be right" if Putin and Trump did not talk at the G20 summit of world economic powers.
"One may state that the two largest nuclear powers still have not started normal joint efforts aimed at mending their bilateral interaction, which is now in a deep crisis", Yury Ushakov said in a speech at the Primakov Readings conference in Moscow.
Such concessions could include returning two diplomatic compounds in the U.S. to Russian Federation or lessening sanctions.
The officials say the amount of substantial contact Moscow has with the USA administration is minimal.