WASHINGTON, DC - JUNE 17: U.S. President Barack Obama (R) and his daughter Malia Obama walk out of the White House hand-in-hand before boarding Marine One on the South Lawn June 17, 2016 in Washington, DC. The first family is traveling to New Mexico and tour Carlsbad Caverns National Park to celebrate the 100th anniversary of the creation of America's national park system. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - JUNE 17: U.S. President Barack Obama (L) and his daughter Malia Obama walk out of the White House hand-in-hand before boarding Marine One on the South Lawn June 17, 2016 in Washington, DC. The first family is traveling to New Mexico and tour Carlsbad Caverns National Park to celebrate the 100th anniversary of the creation of America's national park system. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - JUNE 17: U.S. President Barack Obama (L) and his daughter Malia Obama walk out of the White House hand-in-hand before boarding Marine One on the South Lawn June 17, 2016 in Washington, DC. The first family is traveling to New Mexico and tour Carlsbad Caverns National Park to celebrate the 100th anniversary of the creation of America's national park system. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - JUNE 17: (L-R) U.S. first lady Michelle Obama, daughters Sasha Obama and Malia Obama, and President Barack Obama leave the White House before boarding Marine One on the South Lawn June 17, 2016 in Washington, DC. The first family is traveling to New Mexico and tour Carlsbad Caverns National Park to celebrate the 100th anniversary of the creation of America's national park system. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - JUNE 17: (L-R) U.S. first lady Michelle Obama, daughters Sasha Obama and Malia Obama, and President Barack Obama leave the White House before boarding Marine One on the South Lawn June 17, 2016 in Washington, DC. The first family is traveling to New Mexico and tour Carlsbad Caverns National Park to celebrate the 100th anniversary of the creation of America's national park system. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - JUNE 17: U.S. President Barack Obama (L) and his daughter Malia Obama walk out of the White House hand-in-hand before boarding Marine One on the South Lawn June 17, 2016 in Washington, DC. The first family is traveling to New Mexico and tour Carlsbad Caverns National Park to celebrate the 100th anniversary of the creation of America's national park system. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - JUNE 17: (L-R) U.S. first lady Michelle Obama, daughters Sasha Obama and Malia Obama, and President Barack Obama leave the White House before boarding Marine Oe on the South Lawn June 17, 2016 in Washington, DC. The first family is traveling to New Mexico and tour Carlsbad Caverns National Park to celebrate the 100th anniversary of the creation of America's national park system. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - JUNE 17: Deputy Crown Prince and Minister of Defense Mohammed bin Salman of Saudi Arabia (L) is escorted by U.S. Deputy Chief of Protocol Mark Walsh as they walk into in the White House on June 17, 2016 in Washington, DC. The deputy crown prince will meet privately with U.S. President Barack Obama to discuss issues "including de-escalating regional conflicts, our campaign against ISIL, Saudi Arabia's National Transformation Program, and efforts to further progress on the objectives agreed to at the U.S.-GCC Summit in April," according to the White House. (Photo by Chip Somodevilla/Getty Images)