Final answer:
Agents discovered emails that might be relevant to the previously closed investigation into Hillary Clinton's private email server, which was controversially announced by James Comey just before the 2016 Election Day.
Step-by-step explanation:
Just days before Election Day, James B. Comey, the F.B.I director, made a statement revealing that agents had discovered emails that might be pertinent to the investigation into Hillary Clinton's use of a private email server while she was Secretary of State. This investigation had been previously concluded in July without any charges. The timing of Comey's announcement, so close to an election, was controversial and sparked debates about its impact on the election's outcome. The broader context of this event includes historical investigations into various allegations against both Bill and Hillary Clinton, such as the Whitewater Development Corporation inquiry, the Paula Jones scandal, and the Benghazi hearings. These investigations often captured significant media attention and were sometimes used in political strategies against the Clintons.