The headquarters of the Democratic National Committee is seen in Washington, U.S. June 14, 2016. REUTERS/Gary Cameron

FILE - JULY 24: According to reports, U.S. Rep. Debbie Wasserman Schultz (D-FL) will be resigning as the Democratic National Committee Chair after emails were released by WikiLeaks which indicated Shultz and fellow officials within the DNC strongly favored former Secretary of State Hillary Clinton's campaign over Sen. Bernie Sanders (I-VT). WASHINGTON, DC - OCTOBER 25: DNC Chairwoman and U.S. Rep. Debbie Wasserman Schultz (D-FL) speaks during the 20th annual Women's Leadership Forum of the Democratic National Committee (DNC) October 25, 2013 in Washington, DC. The DNC held the forum to discuss women's roles in leadership. First lady Michelle Obama will address the forum in the afternoon. (Photo by Alex Wong/Getty Images)

FILE - JULY 24: According to reports, U.S. Rep. Debbie Wasserman Schultz (D-FL) will be resigning as the Democratic National Committee Chair after emails were released by WikiLeaks which indicated Shultz and fellow officials within the DNC strongly favored former Secretary of State Hillary Clinton's campaign over Sen. Bernie Sanders (I-VT). WASHINGTON, DC - APRIL 28: Rep. Debbie Wasserman Schultz,(D-CA), speaks while flanked by House Democrats during a news conference to discuss H.R.3185, the "Equity Act," which would codify federal civil rights protections for LGBT citizens, on Capitol Hill, April 28, 2016 in Washington, DC. (Photo by Mark Wilson/Getty Images)

FILE - JULY 22: Hillary Clinton has chosen junior Senator of Virginia Tim Kaine as her running mate. WASHINGTON, DC - JULY 06: U.S. Sen. Tim Kaine (D-VA) arrives at the Capitol July 6, 2016 in Washington, DC. Senate Democrats held a weekly policy luncheon to discuss Democratic agenda. (Photo by Alex Wong/Getty Images)

(FILES) This file photo taken on June 05, 2014 shows US Senator Tim Kaine,D-Virginia, during hearings held by the US Senate Foreign Relations Committee On Capitol Hill in Washington, DC. Hillary Clinton picks Senator Tim Kaine for Vice President. / AFP PHOTO / Karen BLEIERKAREN BLEIER/AFP/Getty Images

(FILES) This file photo taken on June 05, 2014 shows US Senator Tim Kaine, D-Virginia, during hearings held by the US Senate Foreign Relations Committee On Capitol Hill in Washington, DC. Hillary Clinton picks Senator Tim Kaine for Vice President. / AFP PHOTO / Karen BLEIERKAREN BLEIER/AFP/Getty Images

WASHINGTON, DC - JULY 22: U.S. President Brack Obama speaks during a meeting with law enforcement officials in the Eisonhower Executive Office Building July 22, 2016 in Washington, DC. (Photo by Mark Wilson/Getty Images)

WASHINGTON, DC - JULY 22: U.S. President Brack Obama greets guests during a meeting with law enforcement officials in the Eisonhower Executive Office Building July 22, 2016 in Washington, DC. (Photo by Mark Wilson/Getty Images)