The solo summit will be held at the 19th century Presidential Palace in Helsinki, one of the Finnish president's official residences.
A look at Trump's past meetings with Putin. He and his wife, Melania, spent the weekend at a golf resort Trump owns in Turnberry. Since then, he has consistently questioned whether the country was really to blame, contradicting the judgment of 17 USA intelligence agencies.
The consensus view in Moscow is that the summit itself is an accomplishment, given how low U.S. Though not a comprehensive list, here are some of the most notable things the President has said about his Russian counterpart - in reverse chronological order.
"You know, I love those countries".
Hillary Clinton and Donald Trump. The texts opened the Justice Department up to claims of institutional bias. CBS News released excerpts Sunday.
"I do believe in meetings", Trump insisted in an interview with CBS News that aired before he touched down in Helsinki.
His summit with Putin is on Monday. Now he's trashing our European allies while fawning all over Vladimir Putin, who he praised for putting on the "best ever" World Cup.
Anti-Trump protesters gathered in Helsinki's Senate Square and marched through the Finnish capital and ended their demonstration at the square.
The president has no public appearances planned after his nighttime arrival. On Saturday, he appeared to wave to a group of people who staged a protest picnic near several holes of the course that are visible from a nearby beach. "Now, you wouldn't think of the European Union, but they're a foe". "Now you wouldn't think of the European Union, but they're a foe".
British Trade Secretary Liam Fox said anti-Trump protesters were an embarrassment to themselves as they had shown bad manners to the leader of the free world. It doesn't mean anything.
"But the fact that they meet with each other is important", he said. Finland has also hosted several sensitive U.S.
One brewery hopes beer can settle U.S. -Russia foreign relations once and for all. "We have now a much more solid North Atlantic Treaty Organisation than they've had for years". "We have to start to set them right". "We also do the same". "There won't be a Perry Mason here, I don't think". Rand Paul (R-Ky.) on Sunday said don't bother.
Putin has denied meddling in the election.
The plan is for Mr. Trump and Mr. Putin to meet Monday in Helsinki with only interpreters present and no other aides.
The president has repeatedly said the investigation into Russian election meddling is a "rigged witch hunt" that makes it hard for him to do substantive deals with Moscow.
It said there was no evidence linking any of the dozen officials to hacking or military intelligence. "He kind of goes in and wings it".
Trump and Putin were expected to hold formal talks while both attended the annual Asia-Pacific Economic Cooperation summit in Danang.
He has since downplayed his Brexit comments - but speaking to the BBC on Sunday Mrs May said Mr Trump had advised her to "sue the EU".
Graham Brookie, who served on President Barack Obama's National Security Council and now directs the Digital Forensic Research Lab to combat Russia's disinformation, was disappointed that Trump did not reiterate USA policy rejecting the annexation of Crimea.
He said on Twitter as he left for Helsinki that he was looking forward to the summit with Putin.
Soini said that both the United States and Russian Federation would like to bring the war in Syria to an end, but the progress may not be made in Helsinki.
Trump complained: "No matter how well I do at the Summit", he'll face "criticism that it wasn't good enough".
The three-day meeting represented at the time the biggest summit conference in European history.
He says, "The objective here is to meet, to put our cards on the table".
Media captionPresident Trump sits for an interview with CBS. "I'm not going in with high expectations". "But I will absolutely firmly ask the question".
Any Trump request for Russia to extradite hacking suspects is likely to fall on deaf ears, however, as the Kremlin, citing the Russian constitution, has a policy of not handing over suspects wanted by other countries.