The summit, which was due to be held at Camp David in June, was later postponed until September.
The issue of Trump's gullible embrace of Putin got new life after a new intelligence report accused Russian Federation of mounting an active new campaign to trash Democratic presidential rival Joe Biden and help Trump win reelection.
The president began his broadside by slamming his former White House national security adviser John Bolton, who he said has repeatedly claimed that Trump trusted Russian President Vladimir Putin more than those in US intelligence agencies.
"We're going to be doing it after the election".
"John Bolton, one of the dumbest people I've met in government and sadly, I've met plenty, states often that I respected, and even trusted, Vladimir Putin of Russian Federation more than those in our Intelligence Agencies", Trump wrote in a tweet Tuesday, referring to his former national security adviser.
Trump said, "We could do it through teleconference or we could do it through a meeting" and indicated that the form of the meeting would continue to be discussed. He feels November would be a "better, calmer atmosphere to have a G7".
Trump, as host of this year's summit, is in charge of the guest list and has said he plans to invite Russia, Australia, South Korea and India. Some global leaders including German Chancellor Angela Merkel have expressed reluctance to meet in person. "I don't think he's anxious about Donald Trump".
In early July, US Secretary of State Mike Pompeo defended Trump's suggestion of inviting Putin to the summit, telling reporters the president "gets to decide if he wants (Putin) to come to a summit or not". "But Bort explained to his colleagues, according to notes taken by one participant in the process, that this reflected not a genuine preference for Sanders but rather an effort 'to weaken that party and ultimately help the current US president.' To allay any speculation that Putin's interest in Trump had cooled, Key Judgment 2 was substantiated by current information from a highly sensitive foreign source described by someone who read the N.I.E.as '100 percent reliable'".