In a letter from Michael Horowitz to Senator Chuck Grassley (full pdf below) the DOJ Inspector General informs congress of multiple investigations, and multiple releases. The primary OIG investigation into the FBI and DOJ politicization will be released in May:

In the ¹footnote Horowitz outlines the Andrew McCabe report was a secondary investigative outcome of the initial investigation, and the supplemental FISA investigation will result in an additional release unattached to the primary.

Here’s the full letter:

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