Republican presidential nominee Donald Trump and Democratic presidential nominee Hillary Clinton's planes are seen at Ronald Reagan Washington National Airport on September 16, 2016 in Arlington, Virginia. / AFP PHOTO / Brendan SmialowskiBRENDAN SMIALOWSKI/AFP/Getty Images

Republican presidential nominee Donald Trump and Democratic presidential nominee Hillary Clinton's planes are seen at Ronald Reagan Washington National Airport on September 16, 2016 in Arlington, Virginia. / AFP PHOTO / Brendan SmialowskiBRENDAN SMIALOWSKI/AFP/Getty Images

WASHINGTON, DC - SEPTEMBER 16: U.S. President Barack Obama meets with business, government, and national security leaders in the Oval Office of the White House September 16, 2016 in Washington, DC. Obama met with the business, government, and national security leaders to discuss the Trans-Pacific Partnership. Pictured are (L-R) former U.S. Treasury Secretary Henry Paulson; Ginni Rometty, Chairwoman, President and CEO of IBM, Ohio Governor John Kasich; former New York Mayor Michael Bloomberg, Obama, Louisiana Governor John Bel Edwards, Atlanta Mayor Kasim Reed and former NATO Supreme Allied Commander James Stavridis. (Photo by Win McNamee/Getty Images)

WASHINGTON, DC - SEPTEMBER 16: U.S. President Barack Obama meets with business, government, and national security leaders in the Oval Office of the White House September 16, 2016 in Washington, DC. Obama met with the business, government, and national security leaders to discuss the Trans-Pacific Partnership. Pictured are (L-R) former U.S. Treasury Secretary Henry Paulson; Ginni Rometty, Chairwoman, President and CEO of IBM, Ohio Governor John Kasich; former New York Mayor Michael Bloomberg, Obama, Louisiana Governor John Bel Edwards, Atlanta Mayor Kasim Reed and former NATO Supreme Allied Commander James Stavridis. (Photo by Win McNamee/Getty Images)

WASHINGTON, DC - SEPTEMBER 16: U.S. President Barack Obama meets with business, government, and national security leaders in the Oval Office of the White House September 16, 2016 in Washington, DC. Obama met with the business, government, and national security leaders to discuss the Trans-Pacific Partnership. Pictured are (L-R) former New York Mayor Michael Bloomberg, Obama, Louisiana Governor John Bel Edwards, and Atlanta Mayor Kasim Reed. (Photo by Win McNamee/Getty Images)

Republican presidential nominee Donald Trump arrives for a press conference at the Trump International Hotel, in Washington, DC on September 16, 2016. / AFP PHOTO / MANDEL NGANMANDEL NGAN/AFP/Getty Images

Republican presidential nominee Donald Trump speaks in front of a group of Medal of Honor recipients and veterans during a press conference at the Trump International Hotel, in Washington, DC on September 16, 2016. / AFP PHOTO / MANDEL NGANMANDEL NGAN/AFP/Getty Images

Republican presidential nominee Donald Trump speaks in front of a group of Medal of Honor recipients and veterans during a press conference at the Trump International Hotel, in Washington, DC on September 16, 2016. / AFP PHOTO / MANDEL NGANMANDEL NGAN/AFP/Getty Images