The summit's conclusion, however, proved even more ominous than a USA president siding with a foreign leader over his own intelligence agencies.
But after the talks, both leaders welcomed the meeting as a "good start" and a "very successful" one.
But Trump, convinced his unique brand of diplomacy can make inroads with Putin, pressed ahead and looked forward to "having an extraordinary relationship" as the pair sat down to discuss everything from Syria, Ukraine and China to trade tariffs and the size of their nuclear arsenals.
He added: 'Duing todays meeting I addressed directly with President Putin the issue of russian interference in our elections...
But Trump downplayed the notion that there was much to be gained by pressing Putin on the issue, noting the Russian president had repeatedly denied Kremlin involvement. The meeting was delayed about an hour as a result.
"Yeah, I did hear these rumors that this allegedly collected compromising material on Mr. Trump when he was visiting Moscow", Putin said through a translator. "There are enough of those that we need to pay attention to".
On Monday, the former CIA chief was expressing his fury that the president declined to back the US intelligence community's assessment that Russian Federation interfered in the 2016 presidential election.
Furthermore, the president questioned the whereabouts of Hillary Clinton's personal email server, and of the former IT aide to congressional Democrats, Imran Awan.
Speaking to reporters after the meeting, Trump said the meeting was a "very good start for everybody". Mr. Trump stunned onlookers by repeatedly defending Putin during the press conference from allegations that Russian Federation interfered in the 2016 election and casting doubt on conclusions to that effect made by US intelligence agencies.
The Russian and United States leaders are holding their first full-format meeting at the Presidential Palace in Helsinki.
Adding to the intrigue surrounding the summit, Russia's Ministry of Foreign Affairs tweeted its agreement. But Trump did not strongly condemn the interference efforts, which USA intelligence agencies insist did occur, including hacking of Democratic emails, the subject of last week's indictment of 12 Russians.
The summit caps a trip overseas during which Trump sternly criticized North Atlantic Treaty Organisation allies for failing to spend enough on their militaries and embarrassed British Prime Minister Theresa May by saying she refused to take his advice about how to negotiate Britain's exit from the EU.
Putin. Thomas Kronsteiner Getty Images
"The president of the United States essentially capitulated, and seems intimidated by Vladimir Putin", said James Clapper, a career intelligence official who served as director of national intelligence through the 2016 race. Earlier, Putin said the United States and Russian Federation should work jointly on cybersecurity. "We ran a brilliant campaign, and that's why I am president". "But I could name others, also". But he continues to face questions about whether he's playing into the hands of Putin, who has long sought to exacerbate and exploit tensions among Western allies.
"I really think the world wants to see us get along".
Trump said, as he has countless times, that there was "no collusion" between his campaign and the Russians.
Mr Putin reiterated that Russian Federation had never interfered in USA affairs.
Though Trump has invested in nuclear modernisation and set a new United States nuclear posture, the US's nuclear arsenal is virtually the same as it was before his election.
Trump, said after blaming Washington's for the poor relations between the two nations.
Trump then launched an attack on the Federal Bureau of Investigation and wanted to know why it had failed to find Clinton's "missing" 33,000 emails. Putin has allowed that non-state actors in Russian Federation - people he likened to "artists" - may have taken it upon themselves to launch cyberattacks on Clinton's campaign and the DNC. Trump and Putin finally entered the Gothic Hall in the Finnish presidential palace at 2:10 p.m.
"No negotiation is worth throwing your own people and country under the bus", she wrote on Twitter.
He made no criticism of Russian Federation on any of the issues that have brought relations between the two powers to the lowest ebb since the Cold War.
"We've had a power indictment of Russian intervention in our election in 2016 from the Mueller investigation".
In further comments that angered some US lawmakers, Trump suggested the United States and Russian Federation were to blame for troubled relations between the two countries.