John McCain: 'As far as American leadership is concerned,' Obama is better than Trump

Sen. John McCain of Arizona gave a harsh critique of President Donald Trump's leadership on the global stage in an interview with The Guardian on Sunday.

McCain, a Republican from Arizona, was asked about Trump's criticism of London Mayor Sadiq Khan in the aftermath of ISIS-claimed terror attacks that rocked the city earlier this month. McCain said that "as far as American leadership is concerned," the US's global standing was better under Obama than under Trump.

McCain, Obama's 2008 general election opponent, frequently criticized Obama's foreign policy while acting as the leading voice on the Senate Armed Services Committee and a leading voice in GOP foreign policy.

RELATED: John McCain through the years

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John McCain through the years
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John McCain through the years
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 - 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)
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)
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"What do you think the message is?" McCain said of Trump's tweet to Khan. "The message is that America doesn't want to lead."

In the rest of the world, McCain added, "They are not sure of American leadership, whether it be in Siberia or whether it be in Antarctica."

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