United States allies who want to isolate Putin, such as Britain, or who are concerned about Trump's attitude towards Russian Federation are likely to be irritated by such a summit.
Trump is scheduled to meet with Putin several days after he stops in Brussels for a North Atlantic Treaty Organisation summit.
Speaking to reporters aboard Air Force One on his way to New Jersey, Trump also said he would discuss the conflicts in Syria and Ukraine and other worldwide issues with Putin during the July 16 summit.
Trump said Sunday that he's "going to mention" Russian meddling in USA elections during his July 16 meeting with Putin, and that the political fighting over the investigation into Russian interference is bad for the country.
Trump will meet Putin in Helsinki after attending a July 11-12 summit of North Atlantic Treaty Organisation leaders and a visit to Britain. Trump feuded with Group of Seven leaders during a summit in Canada last month over trade, abruptly dropping support for a routine joint statement.
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The meeting will be closely watched by US allies in Europe and critics of the Kremlin back in America.
Russian Federation annexed the Ukrainian Peninsula of Crimea in 2014.
"I don't read the way he conducted these meetings the same way", Bolton told Fox News Sunday host Chris Wallace. Mattis vows "ironclad" support for South Korea's defense Rosenstein and Wray: We're not angry nor are we Democrats Rosenstein unaware of "disqualifying" conflict of interest for Mueller MORE and the now disgraced Federal Bureau of Investigation agents take and closely examine it? "They're very, very different - the president treats them differently".
In a Twitter post on Thursday before the Helsinki meeting was announced, Trump again appeared to cast doubt on Russian involvement. "We'll be talking about elections. we don't want anybody tampering with elections".
"Russia continues to say they had nothing to do with Meddling in our Election!". I've said it from day one, getting along with Russian Federation and with China and with everybody is a very good thing.
"Germany has to spend more money", he said. "When they say they didn't meddle, they're lying. And I think he looks at Putin, he thinks there's a guy who controls his own parliament, doesn't have dissent, controls his media, basically has far more power than the size of his country and his economy might indicate, and he wants to be like that", Campbell told Zakaria.