WASHINGTON, DC - JULY 07: FBI Director James Comey testifies during a hearing before House Oversight and Government Reform Committee July 7, 2016 on Capitol Hill in Washington, DC. The committee held a hearing "Oversight of the State Department," focusing on the FBI's recommendation not to prosecute Democratic presidential candidate Hillary Clinton for maintaining a private email server during her time as Secretary of State. (Photo by Alex Wong/Getty Images)

Guests wave as US President Barack Obama departs the White House for his trip to Warsaw, Poland, on July 7, 2016, in Washington, DC. / AFP PHOTO / MOLLY RILEYMOLLY RILEY/AFP/Getty Images

FBI Director James Comey arrives to testify at a House Oversight and Government Reform Committee hearing on Capitol Hill in Washington, DC, on July 7, 2016. Comey is testifying on his July 5 recommendation that no charges be brought over US Democratic presidential candidate Hillary Clinton's use of a private email server while secretary of state, saying the investigation does not support a criminal prosecution. / AFP PHOTO / YURI GRIPASYURI GRIPAS/AFP/Getty Images

FBI Director James Comey arrives to testify at a House Oversight and Government Reform Committee hearing on Capitol Hill in Washington, DC, on July 7, 2016. Comey is testifying on his July 5 recommendation that no charges be brought over US Democratic presidential candidate Hillary Clinton's use of a private email server while secretary of state, saying the investigation does not support a criminal prosecution. / AFP PHOTO / YURI GRIPASYURI GRIPAS/AFP/Getty Images

FBI Director James Comey arrives to testify at a House Oversight and Government Reform Committee hearing on Capitol Hill in Washington, DC, on July 7, 2016. Comey is testifying on his July 5 recommendation that no charges be brought over US Democratic presidential candidate Hillary Clinton's use of a private email server while secretary of state, saying the investigation does not support a criminal prosecution. / AFP PHOTO / YURI GRIPASYURI GRIPAS/AFP/Getty Images

FBI Director James Comey is sworn-in before a House Oversight and Government Reform Committee hearing on Capitol Hill in Washington, DC, on July 7, 2016. Comey is testifying on his July 5 recommendation that no charges be brought over US Democratic presidential candidate Hillary Clinton's use of a private email server while secretary of state, saying the investigation does not support a criminal prosecution. / AFP PHOTO / YURI GRIPASYURI GRIPAS/AFP/Getty Images

WASHINGTON, DC - JULY 07: Presumptive Republican presidential nominee Donald Trump waves as he leaves RNC headquarters after a meeting with House Speaker Paul Ryan (R-WI), and House Republicans July 7, 2016 in Washington, DC. Later in the day Trump is scheduled to meet with Senate Republicans. (Photo by Mark Wilson/Getty Images)

FBI Director James Comey is sworn-in before a House Oversight and Government Reform Committee hearing on Capitol Hill in Washington, DC, on July 7, 2016. Comey is testifying on his July 5 recommendation that no charges be brought over US Democratic presidential candidate Hillary Clinton's use of a private email server while secretary of state, saying the investigation does not support a criminal prosecution. / AFP PHOTO / YURI GRIPASYURI GRIPAS/AFP/Getty Images