Sen. John McCain criticized President Donald Trump on Saturday after Trump said he believed Vladimir Putin's claim that Russia did not interfere in the 2016 election.
McCain said believing Putin and not the US intelligence community "is not only naive but also places our national security at risk."
Trump has long been reluctant to accept that Russia interfered in the election, and he called former intelligence officials who said otherwise "political hacks."
Sen. John McCain of Arizona blasted President Donald Trump on Saturday after Trump said he believed Russian President Vladimir Putin's denials that Russia interfered in the 2016 US election.
"There's nothing 'America First' about taking the word of a KGB colonel over that of the American intelligence community," McCain said in a statement. "There's no 'principled realism' in cooperating with Russia to prop up the murderous Assad regime, which remains the greatest obstacle to a political solution that would bring an end to the bloodshed in Syria."
McCain was referring to Syrian president Bashar al-Assad, a strongman and authoritarian leader who has been accused of multiple human rights abuses since he took power.
"Vladimir Putin does not have America's interests at heart," McCain continued. "To believe otherwise is not only naive but also places our national security at risk."
Putting the Trump-Russia timeline in perspective:
Putting the Trump-Russia timeline into perspective
Putting the Trump-Russia timeline into perspective
June 7: The 2016 primary season essentially concludes, with both Donald Trump and Hillary Clinton as the presumptive party nominees
June 9: Donald Trump Jr. — along with Jared Kushner and former campaign chair Paul Manafort — meets with Kremlin-connected lawyer Natalia Veselnitskaya.
June 9: Trump tweets about Clinton's missing 33,000 emails
July 18: Washington Post reports, on the first day of the GOP convention, that the Trump campaign changed the Republican platform to ensure that it didn't call for giving weapons to Ukraine to fight Russian and rebel forces
July 21: GOP convention concludes with Trump giving his speech accepting the Republican nomination
July 22: WikiLeaks releases stolen emails from the Democratic National Committee
July 25: Democratic convention begins
July 27: In final news conference of his 2016 campaign, Trump asks Russia: "If you're listening, I hope you're able to find the 30,000 emails that are missing"
August 4: Obama CIA Director John Brennan confronts his Russian counterpart about Russia's interference. "[I] told him if you go down this road, it's going to have serious consequences, not only for the bilateral relationship, but for our ability to work with Russia on any issue, because it is an assault on our democracy," Brennan said on "Meet the Press" yesterday.
October 4: WikiLeaks' Julian Assange says his organization will publish emails related to the 2016 campaign
October 7: WikiLeaks begins releasing Clinton Campaign Chair John Podesta's emails
October 7: Department of Homeland Security and the Director of National Intelligence release a statement directly saying that Russia is interfering in the 2016 election
October 31: "This WikiLeaks is like a treasure trove," Trump says on the campaign trail
November 4: "Boy, I love reading those WikiLeaks," Trump says from Ohio.
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The Arizona Republican's statement came following Trump's comments to reporters Saturday morning about a meeting he had with Putin on the sidelines of the Asia-Pacific Economic Cooperation summit.
"He said he didn't meddle. He said he didn't meddle," Trump said, referring to Putin. "I asked him again. You can only ask so many times. I just asked him again. He said he absolutely did not meddle in our election. He did not do what they are saying he did."
He added that whenever they had met, Putin denied ordering Russia's election meddling. "I believe, I really believe that when he tells me that, he means it," Trump said. "But he says, 'I didn't do that.' I think he is very insulted by it, which is not a good thing for our country."
The president also lashed out at three former high-ranking members of the US intelligence community: former FBI director James Comey, former CIA director John Brennan, and former Director of National Intelligence James Clapper.
"I mean, give me a break, they are political hacks," Trump said of the three men. "So you look at it, I mean, you have Brennan, you have Clapper, and you have Comey. Comey is proven now to be a liar and he is proven now to be a leaker. So you look at that and you have President Putin very strongly, vehemently says he had nothing to do with them."
As part of its investigation into Russia's election interference, the FBI is also looking into whether the Trump campaign colluded with Moscow to tilt the race in his favor.
Special counsel Robert Mueller is also said to be building an obstruction-of-justice case related to Trump's decision to fire Comey in May. The White House said at first that Comey was fired because of his handling of the Clinton email investigation, but Trump later told NBC's Lester Holt that "this Russia thing" was a factor in his decision.
Last month, Mueller indicted Trump's former campaign chairman, Paul Manafort, and his former campaign adviser, Rick Gates, on 12 counts. Mueller's office also unsealed documents revealing that George Papadopoulos, an early foreign policy adviser to the campaign, had been arrested in July and pleaded guilty in early October to one count of lying to federal agents about his contacts with individuals linked to the Russian government. He is now believed to be cooperating with federal authorities.
UNITED STATES - FEBRUARY 27: TV RATINGS--Senate Commerce Committee Chairman John McCain, R-Ariz., during hearing on the TV ratings system. (Photo by Douglas Graham/Congressional Quarterly/Getty Images)
20th August 1992: The Republican Senator from Arizona, John McCain, speaking at the Republican National Convention. A fomer prisoner of war for several years in Vietnam, he contested his party's nomination for the 2000 election. (Photo by Consolidated News Pictures/Getty Images)
HANOI, VIET NAM: U.S. Sen. John McCain, a former POW, looks 31 May 1993 at a display of personal belongings of American POWs at the joint POW/MIA archives center in the Hanoi Army Museum. McCain is with U.S. Sen. John Kerry and a delegation on a two-day visit aimed at obtaining more access to archives dealing with the fate of missing U.S. servicemen. (Photo credit should read HOANG DINH NAM/AFP/Getty Images)
UNITED STATES - MAY 18: MCCAIN'S DAY--Sen John McCain, R-Ariz., relaxes in his office at about 2:15 p.m. (Photo by Scott J. Ferrell/Congressional Quarterly/Getty Images)
UNITED STATES - JUNE 02: McCAIN BILL--John McCain,R-Ariz.,during a press conference on the McCain Bill and tobacco legislation. (Photo by Douglas Graham/Congressional Quarterly/Getty Images)
WASHINGTON, : US Senator John McCain, R-AZ, chairman of the Senate Committee on Commerce, Science and Transportation begins the start of a hearing on the investigation of the scandal surrounding the 2002 Salt Lake City Winter Olympics on Capitol Hill in Washington, DC 14 April, 1999. AFP PHOTO/Mario TAMA (Photo credit should read MARIO TAMA/AFP/Getty Images)
HANOVER, : US Senator John McCain speaks to reporters 27 October,1999 in Hanover, New Hampshire. McCain criticized sugar, oil, and corn (shown behind) subsidies and linked them to 'soft money' campaign contributions. (ELECTRONIC IMAGE) AFP PHOTO Luke FRAZZA (Photo credit should read LUKE FRAZZA/AFP/Getty Images)
MANCHESTER, : Republican president hopeful John McCain greets supporters as he arrives at a debate forum sponsored by a local television station 02 December, 1999, in Manchester, New Hampshire. McCain will debate the other Republican candidates seeking the party's presidential nomination. (DIGITAL IMAGE) AFP PHOTO/John MOTTERN (Photo credit should read JOHN MOTTERN/AFP/Getty Images)
UNITED STATES - CIRCA 2000: John McCain addresses a shadow convention at the Annenberg Center of the University of Pennsylvania. McCain was booed when he asked suppoters to back his former primary opponent, George W. Bush. The shadow convention was put on near the site of the Republican National Convention in Philadelphia to highlight issues that the organizers say the major parties are ignoring. (Photo by Harry Hamburg/NY Daily News Archive via Getty Images)
CAMDEN, UNITED STATES: GOP presidential hopeful US Senator John McCain (R-AZ) waves during an 'Old Fashion BBQ and Stump Meeting' on the front yard of a supporter's house 08 January 2000 in Camden, South Carolina. (ELECTRONIC IMAGE) AFP PHOTO/Paul J. RICHARDS (Photo credit should read PAUL J. RICHARDS/AFP/Getty Images)
PETERBOROUGH, NH - JANUARY 30: Republican presidential hopeful Sen. John McCain (L) and his wife Cindy are showered with confetti following McCain's final town meeting 30 January, 2000 in Peterborough, New Hampshire. (ELECTRONIC IMAGE) (Photo credit should read C.J. GUNTHER/AFP/Getty Images)
GREENWOOD, : Republican presidential hopeful John McCain makes a point 14 February 2000 during a town hall meeting at the American Legion Post 20 in Greenwood, South Carolina. McCain is campaigning heavily in the southern state against Texas Governor Geroge W. Bush ahead of the 19 February 2000 primary. (ELECTRONIC IMAGE) AFP PHOTO/Tim SLOAN (Photo credit should read TIM SLOAN/AFP/Getty Images)
THE TONIGHT SHOW WITH JAY LENO -- Episode 1789 -- Pictured: (l-r) Senator John McCain during an interview with host Jay Leno on March 1, 2000 -- (Photo by: Paul Drinkwater/NBC/NBCU Photo Bank via Getty Images)
UNITED STATES - APRIL 30: Sen. John McCain, R-AZ, at a Senate Commerce, Science and Transportation Committee hearing on climate change. (Photo By Tom Williams/Roll Call/Getty Images)
UNITED STATES - FEBRUARY 12: TEMPORARY GUEST WORKERS--Witness Sen. John McCain, R-Ariz., during the Senate Judiciary Immigration, Border Security and Citizenship Subcommittee hearing titled 'Evaluating a Temporary Guest Worker Proposal.' (Photo by Scott J. Ferrell/Congressional Quarterly/Getty Images)
UNITED STATES - JUNE 28: SENATE POLICY LUNCHES--Sen. John McCain, R-Ariz., talks to reporters after the Senate GOP policy luncheon. (Photo by Scott J. Ferrell/Congressional Quarterly/Getty Images)
WASHINGTON - SEPTEMBER 20: U.S. Senator John McCain (R-AZ) addresses The Northern Virginia Technology Council's Titans breakfast at the Capitol Hilton September 20, 2006 in Washington, DC. McCain spoke on a variety of subjects, including telecommunications legislation, net neutrality, research and development tax credits, immigration, and Internet taxes. He also addressed the rift that he and several other Republican senators are having with the White House over the Geneva Conventions. (Photo by Chip Somodevilla/Getty Images)
KABUL, AFGHANISTAN - JULY 04: US Senator John McCain (C) holds a press conference at ISAF HQ in Kabul, Afghanistan on July 4, 2017. US Senator John McCain visited the headquarters of NATO-led mission after his visit at Pakistan. (Photo by Haroon Sabawoon/Anadolu Agency/Getty Images)
WASHINGTON, July 13, 2017 -- U.S. Senator John McCain is swarmed by reporters as he leaves a meeting on Capitol Hill in Washington D.C. July 13, 2017. Senate Republicans of the U.S. Congress on Thursday unveiled a new healthcare bill that they hoped can fulfill their long-time goal to 'repeal and replace' the Affordable Care Act. (Xinhua/Ting Shen via Getty Images)