Former U.S. Secretaries of State meet with President Barack Obama to discuss the Trans-Pacific Partnership (TPP) at the White House in Washington, November 13, 2015. REUTERS/Kevin Lamarque

Washington, USA; Patrick Hickey, ANOC senior vice president and president of the European Olympic Committees, poses on the blue carpet prior to the 2015 ANOC Awards at DAR Constitution Hall. Mandatory Credit: Geoff Burke-USA TODAY Sports/File Photo

U.S. President Barack Obama waves as he walks out from the White House before his departure to view flood damaged area in Baton Rouge, in Washington, U.S., August 23, 2016. REUTERS/Yuri Gripas

FILE - AUGUST 29, 2016: It was reported that top Hillary Clinton aide, Huma Abedin announced she is separating from Anthony Weiner in wake of allegations of him sending lewd messages to woman online August 29, 2016. WASHINGTON, DC - OCTOBER 22: Long-time aide to Democratic presidential candidate and former Secretary of State Hillary Clinton, Huma Abedin, is seen during a hearing before the House Select Committee on Benghazi October 22, 2015 on Capitol Hill in Washington, DC. The committee held a hearing to continue its investigation on the attack that killed Ambassador Chris Stevens and three other Americans at theÊdiplomatic compound in Benghazi, Libya,Êon the evening of September 11, 2012. (Photo by Alex Wong/Getty Images)

SEATTLE, WA - AUGUST 28: Delta Air Lines Vice President-Seattle Mike Medeiros speaks to fans at the terminal before the Delta Fabric of Sounders FC Fan Flight to Portland on August 28, 2016 in Seattle, Washington. (Photo by Mat Hayward/Getty Images for Delta Air Lines)

Then White House senior adviser David Plouffe walks to the Marine One helicopter to depart with U.S. President Barack Obama for a day trip to Ohio and New York, from the White House in Washington, June 14, 2012. REUTERS/Jonathan Ernst

Then White House senior adviser David Plouffe walks to the Marine One helicopter to depart with U.S. President Barack Obama for a day trip to Ohio and New York, from the White House in Washington, June 14, 2012. REUTERS/Jonathan Ernst

U.S. President Barack Obama takes his jacket off as he walks on the South Lawn of the White House in Washington, U.S. after visiting the Walter Reed National Military Medical Center, August 26, 2016. REUTERS/Yuri Gripas