"This President has surrendered lock, stock and barrel to President Putin's deceptions about the attacks on America's democracy", Kerry said in the statement.
However, the prime minister said he found the evidence for Russian interference in the United States elections "very compelling".
"I hold both countries responsible", Trump said when asked whether he held Russian Federation accountable for anything in particular in regard to poor relations between the countries.
Putin also suggested Monday that Moscow and Washington could jointly conduct criminal investigations into a dozen Russian intelligence officials accused of hacking during the 2016 USA election campaign - an idea Trump hailed as an "incredible offer".
The press conference, in which President Trump reiterated his belief that Russian Federation didn't interfere in the 2016 election, generated rare bipartisan agreement: prominent Republican and Democratic lawmakers agreed the meeting was a catastrophe for United States global interests. I've been wondering that, I've been asking that for months and months, and I've been tweeting it out and calling it out on social media.
The news conference also rattled some officials in the State and Defense Departments and in us intelligence agencies, according to officials in five government offices. "For the president of the United States to side with President Putin against American law enforcement, American defense officials, and American intelligence agencies is thoughtless, dangerous, and weak". Vladimir Putin is not our friend and never has been. Even House speaker Paul Ryan managed to roust himself to state that Trump should recognise that "Russia is not our ally".
The harshest critiques, however, may be coming from members of his own party. Sen.
"The ghost of Ronald Reagan must be in shock".
"Today's press conference in Helsinki was one of the most disgraceful performances by an American president in memory", McCain said in the statement.
Shortly after, the site also tweeted definitions of the words "patriot" and "traitor".
Johnson says US intelligence agencies have "documented evidence" of Russia's interference and called it "serious" and "unacceptable".
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Trump wins sympathy from Russian media ahead of summit
He called on Moscow and Washington to warm a period of frosty relations, largely because of the sizes of their nuclear arsenals. Hours earlier, Trump lambasted his own government for poor US relations with Russian Federation.
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Putin said that he would look into the matter and promised nothing.
Just before going behind closed doors though, Trump, who had not been clear about his plans for the conversation, described a long list of topics he wanted to discuss but did not mention Russia's interference in the 2016 election or the upcoming midterm elections.
"Yes, I did. Yes, I did".
The reporter gave Trump the chance to share at least some of the blame with Moscow, asking, "Do you hold Russian Federation at all accountable for anything in particular?"
The US and Russia will work on a joint humanitarian project to help Syrians displaced by the war, Trump said, and Putin added that the two countries would create a new working group to bring together the captains of Russian and American business.
"Any meaningful improvement in our relationship with Russian Federation must be exclusively dependent on whether Putin's government starts to behave as a good faith actor on the world stage", Tillis said in a statement. "Unfortunately, recent history casts serious doubt on if that is even a possibility".
Several Republican senators - including John McCain of Arizona, Lindsey Graham of SC and Ben Sasse of Nebraska - attacked Trump. "We heard none of it in the press conference". "The president should use this as an opportunity to tell the Russians that our North Atlantic Treaty Organisation alliance is strong as we work together against Russian attempts to undermine regional and global security and stability". "Just jaw dropping", he wrote on Twitter.
Democrats joined the chorus of complaints about Trump's performance.
"Today, @realDonaldTrump put Russian Federation first".
Joe Walsh, a nationally-syndicated conservative talkback radio host and former Republican congressman, said he would never support the President again.