President Barack Obama told FOX News what he thought was the worst mistake of his presidency on Sunday, saying his failure to adequately plan for the aftermath of the U.S.-supported overthrow of Libyan dictator Muammar Gaddafi in 2011 was "probably" his biggest error.

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"Probably failing to plan for the day after what I think was the right thing to do in intervening in Libya," the president told Fox's Chris Wallace in response to the inquiry.

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44 PHOTOS 44 behind-the-scenes images of Barack Obama's tenure as president See Gallery President Obama calls Libyan intervention biggest mistake of his administration White House photographer Pete Souza took this photo of President-elect Barack Obama moments before Obama took the oath of office. (Photo by Pete Souza/The White House) President Obama and first lady Michelle Obama shared a moment at the Inaugural Ball on January 20, 2009. (Photo by Pete Souza/The White House) The next day, Obama entered the Oval Office to begin his first full day as America's 44th president. (Photo by Pete Souza/The White House) LONDON, ENGLAND - APRIL 22: In this handout provided by The White House, President Barack Obama, Prince William, Duke of Cambridge and First Lady Michelle Obama talks with Prince George at Kensington Palace on April 22, 2016 in London, England. The President and his wife are currently on a brief visit to the UK where they attended lunch with HM Queen Elizabeth II at Windsor Castle and later dinner with Prince William and his wife Catherine, Duchess of Cambridge at Kensington Palace. Mr Obama visited 10 Downing Street this afternoon and held a joint press conference with British Prime Minister David Cameron where he stated his case for the UK to remain inside the European Union. (Photo by Pete Souza/The White House via Getty Images) Obama reads a letter that former President George W. Bush left for him in the Oval Office's resolute desk. Leaving a letter for the incoming president has become a White House tradition. (Photo by Pete Souza/The White House) Obama toured the White House grounds with curator William Allman, chief usher Adm. Stephen Rochon, and presidential personal aide Reggie Love. (Photo by Pete Souza/The White House) Here's a photo of Obama meeting with senior advisers in the Oval Office during the third week of his presidency. (Photo by Pete Souza/The White House) Wearing an embroidered crew jacket, Obama waited for the first of many flights aboard Air Force One. (Photo by Pete Souza/The White House) Obama gave his first State of the Union address on February 24, 2009. (Photo by Pete Souza/The White House) The Obamas walked to Marine One on the South Lawn before heading off on one of their first trips to Camp David. (Photo by Pete Souza/The White House) In this handout from the White House, U.S. President Barack Obama works on his Newtown speech at The Music Center at Strathmore auditorium on December 16, 2012 in Bethesda, Maryland. Obama later visited Newtown, Connecticut to speak at an interfaith vigil for the shooting victims from Sandy Hook Elementary School. (Photo by Pete Souza/The White House via Getty Images) The Obamas were welcomed by Queen Elizabeth II to Buckingham Palace in London while in town for the G20 summit. (Photo by Pete Souza/The White House) Obama gave a fist bump to a US soldier while visiting troops at Camp Victory in Iraq on April 7, 2009. (Photo by Pete Souza/The White House) President Obama and Michelle smiled at each other inside a White House elevator after a Cinco de Mayo celebration. (Photo by Pete Souza/The White House) Obama and Vice President Joe Biden practiced their putting skills on the White House green. (Photo by Pete Souza/The White House) Obama tours the Pyramids of Giza in Egypt for the first time during his 11th presidential trip abroad. (Photo by Pete Souza/The White House) In this July 2009 photo, Obama attended his first G8 summit, which was held in L'Aquila, Italy. (Photo by Pete Souza/The White House) Over the summer of 2009, Obama visited the Grand Canyon in Arizona. (Photo by Pete Souza/The White House) Obama laughed at a picture of himself during an interview on the "Late Show with David Letterman." (Photo by Pete Souza/The White House) The Obamas welcomed children from local schools for Halloween festivities at the White House. (Photo by Pete Souza/The White House) The Obamas posed for their first holiday portrait in front of the official White House Christmas tree. (Photo by Pete Souza/The White House) At the beginning of the new year, White House photographer Pete Souza took this photo of Obama meeting with members of his cabinet. The president's chair is marked with a plaque engraved with his inauguration date. (Photo by Pete Souza/The White House) The Obamas danced during the Governors' Ball held in the East Room of the White House. (Photo by Pete Souza/The White House) Obama reads some documents while waiting for Marine One at the Westchester County Airport in New York. (Photo by Pete Souza/The White House) Obama speaks with a congressman about the healthcare-reform bill. "In those final days before the vote, the President made hundreds of calls," wrote White House photographer Pete Souza. (Photo by Pete Souza/The White House) Alongside White House staff and Vice President Joe Biden, Obama clapped while watching the historic House vote to pass the Affordable Care Act. (Photo by Pete Souza/The White House) Obama boarded Air Force One while the sun set at Miami International Airport. (Photo by Pete Souza/The White House) The Obamas pretended to sing with an a capella group after a holiday tour of the White House. (Photo by Pete Souza/The White House) "A lighter moment during a meeting in the Situation Room of the White House," Souza wrote. (Photo by Pete Souza/The White House) Obama shook hands with US soldiers at Bagram Airfield after an all-night, unannounced flight to Afghanistan in December 2010. (Photo by Pete Souza/The White House) The Obamas stared at Rio de Janeiro's famous Christ the Redeemer statue while visiting Brazil in March 2011. (Photo by Pete Souza/The White House) Obama saluted a Marine while walking toward Marine One helicopter on the South Lawn of the White House. (Photo by Pete Souza/The White House) Taken on May 1, 2011, from the White House Situation Room, Obama's national-security team monitored the real-time mission against Osama bin Laden. Souza took approximately 100 photographs during this confidential meeting. (Photo by Pete Souza/The White House) "The president was ready to announce the news about the mission against Osama bin Laden and was putting the finishing touches on his statement in the Outer Oval Office. As he did so, the networks broke in with bulletins confirming that bin Laden had been killed and a photograph of him appeared on the television screen in the background near the Vice President and Press Secretary Jay Carney," Souza wrote. (Photo by Pete Souza/The White House) "One of the most memorable moments of the year was when the president hugged Rep. Gabrielle Giffords as he walked onto the floor of the House Chamber at the US Capitol to deliver his annual State of the Union address," Souza wrote in January 2012. Giffords was shot in a 2011 mass shooting in Arizona. (Photo by Pete Souza/The White House) "The President hugs the first lady after she had introduced him at a campaign event in Davenport, Iowa. The campaign tweeted a similar photo from the campaign photographer on election night and a lot of people thought it was taken on election day," Souza wrote. When the campaign tweeted it on election night, it became the most retweeted photo of all time. (Photo by Pete Souza/The White House) Obama kissed the first lady for the "kiss cam" during the US men's Olympic basketball team's game against Brazil in Washington, D.C. (Photo by Pete Souza/The White House) Obama sang "Happy Birthday" to Michelle in the Blue Room of the White House in 2013. Her new hairstyle attracted a lot of attention. (Photo by Pete Souza/The White House) In this photo, Obama sits in front of cameras taking images that will later make a 3D portrait for the Smithsonian Institution. (Photo by Pete Souza/The White House) "We were at the NATO Summit in Wales when someone mentioned to the President that Stonehenge wasn't that far away. 'Let's go,' he said. So when the Summit ended, we took a slight detour on the way back to Air Force One," Souza wrote in September 2014. (Photo by Pete Souza/The White House) Obama laughed as he and Michelle recorded a holiday video message in the Map Room of the White House. (Photo by Pete Souza/The White House) This March 2015 photo shows Obama delivering remarks during an event to commemorate the 50th Anniversary of Bloody Sunday and the Selma to Montgomery civil-rights marches. (Photo by Pete Souza/The White House) Obama shook hands with President Raúl Castro of Cuba during the Summit of the Americas on April 11, 2015. The US and Cuba have moved toward a historic thaw in relations over the past year. (Photo by Pete Souza/The White House) U.S. President Barack Obama and his daughters Malia (L) and Sasha, watch on television as first lady Michelle Obama takes the stage to deliver her speech at the Democratic National Convention, in the Treaty Room of the White House in Washington September 4, 2012. (REUTERS/White House/Pete Souza/Handout) Up Next See Gallery Discover More Like This HIDE CAPTION SHOW CAPTION of SEE ALL BACK TO SLIDE

According to the president, he still believes the U.S. was right to intervene in the conflict. U.S. air strikes, intelligence personnel and logistical support proved crucial to bringing the rebellion against Qaddafi to a close, though the country has remained chaotic since. After the coalition against Qaddafi failed to implement a credible successor to his rule, much of the country has been taken over by various militias and warlords.

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The U.S. is still bombing Islamic State training camps in the country, a testament to the ongoing lawlessness in today's Libya, where the terror group controls an estimated 120-mile stretch of territory around the city of Sirte.

U.N.-appointed Prime Minister Faiez Serraj recently entered the capitol, Tripoli, but according to Foreign Policy'sBel Trew has yet to assert his authority beyond restoring order to the city's streets. Serraj must "rebuild Libya's fractured institutions, tame power-hungry militias, win support from partisans of the government in the east, and -- last but not least -- crush the Islamic State's nascent 'caliphate'," Trew writes, a hefty slate of challenges for any leader.

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The president recently told the Atlantic's Jeffrey Goldberg many of the U.S.' European allies in the conflict had lost interest in Libya after Qaddafi was toppled in 2011, contributing to the "mess" the country remains in.

"So we actually executed this plan as well as I could have expected," Obama told Goldberg. "We got a UN mandate, we built a coalition, it cost us $1 billion -- which, when it comes to military operations, is very cheap. We averted large-scale civilian casualties, we prevented what almost surely would have been a prolonged and bloody civil conflict. And despite all that, Libya is a mess ... I had more faith in the Europeans, given Libya's proximity, being invested in the follow-up."

Obama's admission may pose a challenge for former secretary of state and current presidential candidate Hillary Clinton, widely viewed as the architect of the administration's intervention in Libya in 2011. Vermont Sen. Bernie Sanders has called attention to the Libyan intervention as an example of Clinton's lack of "judgment," while a recent New York Times profile noted her expansive view of when to use U.S. military force "ran aground in a tribal country with no functioning government, rival factions and a staggering quantity of arms."

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60 PHOTOS Best photos of President Obama with children See Gallery President Obama calls Libyan intervention biggest mistake of his administration Hi! (Photo via The White House) This photo is everything. (Photo via The White House) A sleepy young Iowan rests his head on the president's shoulder. (Photo via AP) This child is a little less calm. (Photo via The White House) Twins! (Photo via The White House) Hi Ella! (Photo via The White House) High fives all around! (Photo via The White House) Easter egg roll! (Photo by Win McNamee/Getty Images) Obama greets one of his youngest fans in Prague in 2009. (Photo via Getty) The president is more amused than his young mohawked friend. (Photo via Getty) The signature fist bump. (Photo via The White House) Obama puffs out his cheeks to amuse an infant visitor to the Oval Office. (Photo via The White House) The president carefully inspects a classroom in Georgia. (Photo via The White House) This baby gives Obama a fist bump of his own. (Photo via The White House) Keeping pace with children running through the White House. (Photo via The White House) Abraham Lincoln watches in approval as the president and a young girl share a hug in the Oval Office. (Photo via The White House) A young Ohio boy splits some strawberry pie with the POTUS. (Photo via The White House) The president said this shot of him and a pint-sized Spider-Man was his favorite of 2012. (Photo via The White House) High five! (Photo via The White House) Groovin. (Photo via The White House) A quick game of hoops in Missouri Valley, Iowa. (Photo via The White House) Cool dad. (Photo via The White House) Obama circles his desk with a petite pink pal in hot pursuit. (Photo via The White House) The Obamas laugh at a child dressed as the pope. (Photo via The White House) It's hard to say who looks more dapper. (Photo via The White House) The president fills in as coach for his daughter Sasha's basketball game. (Photo via The White House) Skeptical infants peer at the POTUS through a window. (Photo via The White House) Obama hoists his young pal Simba-style. (Photo via The White House) President Pied Piper. (Photo via The White House) Holding House Speaker Nancy Pelosi's granddaughter in California. (Photo via The White House) Dandelion blowing on Martha's Vineyard. (Photo via The White House) An adorable tie-wearing baby visits the White House. (Photo via The White House) The president embraces a young girl during a 2011 visit to Ireland. (Photo via The White House) Well hello there. (Photo via The White House) Sharing secrets. (Photo via The White House) First Lady Michelle Obama persuades her husband to join in the dancing in Mumbai, India. (Photo via The White House) The president greeting some Estonian schoolgirls. (Photo via The White House) The president at the heart of the La Follette Lancers' huddle in Madison, Wis. (Photo via The White House) Spelling out "Ohio" with some of the state's happiest residents. (Photo via The White House) Pure delight! (Photo via The White House) Trick or Treat! (Photo via The White House) Not impressed. (Photo via BRENDAN SMIALOWSKI/AFP/Getty Images) Sasha and her father splash around in the ocean on a vacation to Florida. (Photo via The White House) Peek-a-boo! (Photo via The White House) High five! (Photo By Tom Williams/CQ Roll Call) The president and his daughters celebrate the arrival of Portuguese Water Dog Bo. (Photo via Getty) The POTUS casually greets a family at Stonehenge. (Photo via The White House) The president hoists a baby into the air during a visit to Japan. (Photo via The White House) A young boy reaches up to compare the president's hair to his own. (Photo via The White House) It's Halloween at the White House. (Photo via The White House) Secret secrets. (Photo via The White House) One White House staffer is extra excited at this encounter. (Photo via The White House) This is Lincoln Rose Pierce Smith, the daughter of former deputy press secretary Jamie Smith. (Photo via The White House) The president also fits in with a slightly older crowd. (Photo via The White House) Obama says hello to a set of twins on the South Lawn. (Photo via The White House) The president lets this first grader touch up his hairdo. (Photo via The White House) All smiles. (Photo via SAUL LOEB/AFP/Getty Images) Nice baby face. (Photo via The White House) Presidential pre-school. (Photo by Aude Guerrucci-Pool/Getty Images) A presidential cheek pinch. (Photo via The White House) Up Next See Gallery Discover More Like This HIDE CAPTION SHOW CAPTION of SEE ALL BACK TO SLIDE

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