Go deeper: FBI faces judgment day on Clinton emails

Michael Horowitz
DOJ Inspector General Michael Horowitz. Photo: Drew Angerer/Getty Images

Following an 18-month investigation, the Justice Department's inspector general Michael Horowitz will release a report tomorrow on the FBI's handling of the Hillary Clinton email investigation prior to the 2016 presidential election.

Why this matters: The FBI has faced questions from across the political spectrum regarding the investigation since 2016. The Trump administration and far-right conservative media have repeatedly used it to challenge the trustworthiness of the Russia investigation — all while accusing the FBI of letting Clinton off the hook. Meanwhile, Democrats have blamed the bureau for mishandling the Clinton probe, costing her the election.