Trump's abrupt announcement came less than an hour after he told reporters he would "probably" meet with the Russian President in Buenos Aires.
"I would be very surprised if Trump and Putin don't meet, at least informally", Bremmer, president and founder of Eurasia Group, said on "The Daily Briefing" Thursday.
All of which means that Trump will have to deal with more than the usual forced grins and awkward handshakes when he confronts his summit counterparts in Buenos Aires.
Russian President Vladimir Putin hands President Donald Trump (L) a World Cup football during a joint press conference after their last summit on July 16 in Helsinki, Finland. But a short time earlier on the south lawn of the White House, the president had said the Putin meetings were still on.
On Tuesday, the White House warned Mr Xi against trying to wait out Mr Trump in the ongoing talks, suggesting the Chinese economy was not as resilient to a trade war as would be the US. The Kremlin's spokesman said Moscow had no official information on Trump's decision, and that if true, Putin would have some extra time for a useful meeting at the G20 summit.
Russian news agencies reported the Kremlin had not been notified in advance of Trump's decision. -Russian relations for years.
Argentina with President Vladimir Putin. Mr Trump also called national security adviser John Bolton while on board, she said.
Russian Federation and Ukraine's regional dispute has been ongoing since Putin annxed Crimea from the former Soviet state back in 2014.
Following the incident, Ukraine's Navy said Russian Federation had "once again demonstrated its aggressive nature and complete neglect of the norms of worldwide law". Modeled on the President's Daily Briefing, or PDB, which the director of national intelligence prepares for the President nearly daily, my Presidential Weekly Briefing focuses on the topics and issues President Donald Trump needs to know to make informed decisions.