"Now, you wouldn't think of the European Union but they're a foe".
Mr Trump said the USA has "a lot of foes" and named the bloc as one of them.
Interviewed on ABC'S "This Week", Bolton said the summit will start with a "direct one-on-one conversation" between Trump and Putin and what happens from there "will be determined by the two parties".
"Whoever says we are foes is spreading fake news", Tusk, who is also a former Polish prime minister, wrote on Twitter.
"I go in with low expectations", Trump told CBS in the same interview. "I'm not going with high expectations". Instead, Paul said Trump and other USA officials should focus on safeguarding upcoming elections from interference.
Trump is scheduled to meet Putin at Helsinki, Finland tomorrow.
Russia's president is likely to resist the "temptation" to deal with the U.S. directly, disregarding the interests of the EU, Kortunov believes, especially as tensions between Donald Trump and European leaders are soaring.
If Trump's instinct is right and he finds common ground with Putin, then the pair's Helsinki Summit may take the heat out of some of the world's most risky conflicts.
Donald Trump told Theresa May to sue the EU, PM reveals
He continued: 'I think you have to give all the protagonists, whether it's the president or the prime minister, a little bit of leeway here.
During last week's North Atlantic Treaty Organisation summit in Brussels, Trump repeatedly criticized members for failing to spend more on defense and openly questioned the alliance's goal.
A federal grand jury indicted 12 Russians on Friday for allegedly hacking computer systems of the Democratic Congressional Campaign Committee, the Democratic Campaign Committee, and the Hillary Clinton campaign, then releasing the information. "We have lots to discuss. Let's get to it".
"The collective blood pressure between the United States and Russian Federation is off-the-charts high so it's a good thing these presidents are getting together", he said during an appearance on NBC's "Meet the Press". "I really would feel much better if there were other Americans in the room". "They had bad defences and they were able to be hacked", he added.
The indictments formed part of an investigation by special counsel Robert Mueller that Trump has denounced as a "witch hunt" created to undermine the legitimacy of his surprise win over Hillary Clinton. Trump has denied any collusion with the Russians by his campaign and Russia denies it meddled.
Trump and Putin have held talks twice before.
When asked by CBS if he would ask Putin to extradite the Russians to the United States, Trump said he had not thought of that idea but that he might. What President Donald Trump truly cares about is "MTGA" - "Make Trump Great Again", and we saw another example of this objective over the weekend.
'The administration has a pretty good policy towards Russian Federation, just the president doesn't agree with it, ' said Michael McFaul, a former US ambassador to Russian Federation under Obama. Aides have argued to Trump that the chances of substantive progress on a host of thorny issues, including Syria and Ukraine, are slim.
But the summit, and the extent of Trump's emphasis on election meddling, could highlight a divide between him and his own advisers, not to mention other Republicans, about the seriousness of Russia's activities.