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.

Trump tweeted that in the wake of the seizure of Ukrainian ships and crews in the Black Sea by Russia, it would be best for all parties concerned to nix the meeting.

"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.

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He noted that at the G20 summit in Germany last year, Trump and Putin spent almost an hour together at a dinner hosted by German Chancellor Angela Merkel.

He said Trump "gets along" with Putin, as he does with the leaders of a number of the G20 countries.

"It's going to be by far the friendliest international summit to him, in part because of where the world has been going -- a lot more nationalist leaders," Bremmer said.

He said the summit will also give Trump an opportunity to discuss trade with Chinese President Xi Jinping, and attempt to get some kind of deal to avoid a prolonged trade war. The two are expected to meet on the sidelines of the summit. 

He noted, however, that Trump is "maximally distracted" by a series of developments this week in Special Counsel Robert Mueller's investigation.

"And that's going to affect his mood."

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