U.S. President Donald Trump pours fish food out as Japan's Prime Minister Shinzo Abe looks on while they were feeding carp before their working lunch at Akasaka Palace in Tokyo, Japan November 6, 2017. Watching from the rear is U.S. Secretary of State Rex Tillerson.

U.S. President Donald Trump talks with Philippines President Rodrigo Duterte during the gala dinner marking ASEAN's 50th anniversary in Manila, Philippines November 12, 2017.

U.S. President Donald Trump and South Korea's President Moon Jae-in hold a bilateral meeting at the Blue House in Seoul, South Korea November 7, 2017.

U.S. President Donald Trump burns incense at the National Cemetery in Seoul, South Korea, November 8, 2017.

U.S. President Donald Trump embraces veteran Max Morgan during an event to acknowledge the 50th anniversary of the war in Vietnam, as part of a visit to Danang, Vietnam November 10, 2017.

Leaders pose during the family photo session at the APEC Summit in Danang, Vietnam November 11, 2017. (Front L-R) China's President Xi Jinping, Vietnam's President Tran Dai Quang, Indonesia's President Joko Widodo, (back L-R) Philippines' President Rodrigo Duterte, Russia's President Vladimir Putin, U.S. President Donald Trump. Reuters/Jorge Silva

U.S. President Donald Trump (L) shakes hands with Japan's Prime Minister Shinzo Abe during a news conference at Akasaka Palace in Tokyo, Japan, November 6, 2017.

U.S. President Donald Trump attends a state dinner hosted by South Korea's President Moon Jae-in in his honor at the Blue House in Seoul, South Korea November 7, 2017.

Opera dancers perform during a visit by U.S. President Donald Trump and China's President Xi Jinping to the Forbidden City in Beijing, China, November 8, 2017.

U.S. first lady Melania Trump poses for photos with children in front of a panda section as she visits Beijing Zoo in Beijing, China, November 10, 2017.

U.S. President Donald Trump ponders the answer to a question from a reporter en route to Hanoi, Vietnam, aboard Air Force One November 11, 2017.

U.S. first lady Melania Trump and Japan's first lady Akie Abe visit Kyobashi Tsukiji elementary school in Tokyo, Japan, November 6, 2017.

U.S. first lady Melania Trump and South Korea's first lady Kim Jung-sook walk at the Presidential Blue House in Seoul, South Korea, November 7, 2017.

U.S. President Donald Trump speaks at the South Korean National Assembly in Seoul, South Korea, November 8, 2017.

U.S. President Donald Trump and first lady Melania arrive for the state dinner with China's President Xi Jinping and China's first lady Peng Liyuan at the Great Hall of the People in Beijing, China, November 9, 2017.

President Trump and Russian President Vladimir Putin shake hands as they take part in a family photo at the APEC summit in Danang, Vietnam. Sputnik/Mikhail Klimentyev/Kremlin via REUTERS

Wooden boxes with the first course sit at each place before an official dinner thrown by Japan's Prime Minister Shinzo Abe in honor of U.S. President Donald Trump at Akasaka Palace in Tokyo, Japan November 6, 2017.

U.S. President Donald Trump and South Korea’s President Moon Jae-in shake hands during a meeting at South Korea’s presidential Blue House in Seoul, South Korea, November 7, 2017.

U.S. President Donald Trump speaks at the South Korean National Assembly in Seoul, South Korea, November 8, 2017.

China's President Xi Jinping holds a welcome ceremony for U.S. President Donald Trump at the Great Hall of the People in Beijing, China November 9, 2017.

U.S. President Donald Trump boards Air Force One to depart for Vietnam from Beijing Airport in Beijing, China November 10, 2017.

White House staff members deplane from Air Force One after arriving with U.S. President Donald Trump at Ninoy-Aquino International Airport in Manila, Philippines November 12, 2017.

U.S. President Donald Trump poses for a photo with military commanders at the U.S. Eighth Army Operation Command Center at U.S. military installation Camp Humphreys in Pyeongtaek, South Korea, November 7, 2017. Also pictured is U.S. Secretary of State Rex Tillerson.

U.S. President Donald Trump smiles during a joint press conference with South Korea's President Moon Jae-in at the presidential Blue House in Seoul, South Korea, November 7, 2017.

U.S. President Donald Trump and first lady Melania depart from the tarmac after their arrival at Beijing Capital Airport, Beijing, China November 8, 2017.

U.S. President Donald Trump speaks on the final day of the APEC CEO Summit ahead of the Asia-Pacific Economic Cooperation (APEC) leaders summit in Danang, Vietnam, November 10, 2017.

U.S. President Donald Trump arrives aboard Air Force One at Noi Bai International Airport in Hanoi, Vietnam November 11, 2017.

The guest book signed by U.S. President Donald Trump and first lady Melania is pictured at South Korea’s presidential Blue House in Seoul, South Korea, November 7, 2017.

White House senior staff discuss the situation as U.S. President Donald Trump sits in his car after being grounded from an attempt to visit the Demilitarized Zone (DMZ) in the truce village of Panmunjom dividing North Korea and South Korea, at a U.S. military post in Seoul, South Korea, November 8, 2017.

U.S. President Donald Trump and China's President Xi Jinping shake hands after making joint statements at the Great Hall of the People in Beijing, China, November 9, 2017.

U.S. President Donald Trump and Russia's President Vladimir Putin talk during the family photo session at the APEC Summit in Danang, Vietnam November 11, 2017.