Clinton, who is seeking the Democratic nomination for the 2016 presidential election, has been under fire for conducting government business on a private email server based out of her Chappaqua home.
A New York Times report in March 2015 sparked the political and national security controversy over Clinton’s email communication. Several prominent law firms are tied up in litigation in Washington federal district court over Clinton’s emails.
The House Select Committee on Benghazi deposed Clinton confidante Sidney Blumenthal in June over emails he sent to then-Secretary Clinton offering private intelligence about Libya.
Clinton is scheduled to testify to the committee in October about her personal email use and her role during the terrorist attacks at the U.S. consulate in Benghazi on September 11, 2012.
Addressing the controversy at a campaign event in Iowa on Friday, Clinton said, “It’s not about Benghazi. And you know what? It’s not about emails or servers, either. It’s about politics.”
The Justice Department on Monday said intelligence agencies had flagged 305 emails from Clinton’s account for further screening for whether they contained classified information.