During a rally in Montana on Thursday, Trump mocked critics of his approach and preparation for the summit with Putin.
"It's not us", Putin has told Trump, the official summarized.
Wolfgang Ischinger, head of the Munich Security Conference and a former German envoy to Washington, said it is possible that Trump could refuse to sign a communique at the July 11-12 North Atlantic Treaty Organisation summit in Brussels, mirroring what he did at a recent Group of Seven summit. A vague promise in a joint communique to work toward denuclearization on the Korean Peninsula was hailed by Trump as having ended North Korea's nuclear threat, although recent reports have indicated that Pyongyang has continued to expand its nuclear weapons capabilities.
"I think that our alliance is very solid and including all of the efforts that the United States is making to shore up the sovereignty of the Ukraine". The European governments are also curious about the road map of US foreign policy in regards to its relation with Russian Federation.
Her comments come just weeks after Trump charged that America is "the piggy bank that (NATO) likes to take from", and "we like to help out, but it helps them, they're in Europe".More news: We're easy to analyse but tough to beat, warns Sweden coach
Given the president's reported desire to explore pulling USA troops from Germany, one administration official said "there is nothing being said at all about the troop alignment in Germany or anything that would change the 32,00 troop force we have in Germany".
"He'll play the long game on this, he'll see this as an investment, as one step down the road toward an. easing of outside pressure", said Bill Burns, a former US ambassador to Russian Federation and deputy secretary of state involved in some of George W. Bush and Barack Obama's summits with Putin.
Then there's the long shadow cast by Vladimir Putin, and fears in some allied capitals at what Trump might offer the Russian leader at their summit in Helsinki next Monday.
Huntsman stressed the importance of going in to any meeting with Russian Federation "with eyes wide open".
We do however, have a reasonable idea of the issues the two leaders and their aides will have mapped out before the meeting: the areas where they each want something from their counterpart, and the places they are willing to give ground.