Russian Federation was expelled from what was then the Group of 8 (G8) in 2014 over its military seizure of Crimea and backing of armed separatists in eastern Ukraine.
Up till now, the West was united in accusing Russian Federation of using force to annex Crimea. On Friday, Trump told reporters that a summit with Putin could be "possible".
He claims, "President Obama lost Crimea, just so you understand".
The BuzzFeed news website earlier reported citing two anonymous diplomatic sources that Trump told the G7 leaders at the summit in Canada that Crimea is Russian because everyone there speaks Russian. It was the second time in a week he has blamed Obama for Putin annexing Crimea.
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Staffers who have left or been forced out of their jobs have described a dysfunctional and toxic working environment. There has been an exodus from the Trump administration in recent months, with a mixture of firings and resignations.
The Obama administration, along with the European Union and individual allied countries, imposed sanctions on Russian Federation over Crimea, and even members of Trump's Cabinet have said they will not be lifted until the situation is resolved.
With President Putin at the old cadence meeting was held on 10 November previous year on the sidelines of the summit in Vietnam.
The Wall Street Journal also reported earlier this month that the USA ambassador to Russia, Jon Huntsman, had come to Washington to meet with Trump administration officials to help arrange the meeting. North Atlantic Treaty Organisation officially suspended all cooperation with Russian Federation, which is not a North Atlantic Treaty Organisation member, nearly immediately after their annexation of Crimea in 2014.
Obama's national security adviser Susan Rice quickly denounced Trump's comments as "disgraceful".
Moreover, later it became known that Trump not only talked about the possibility of a meeting, but also invited Putin to Washington for this goal.