Writing at Red State, the pseudonymous “Shipwreckedcrew” provides one very logical, possible answer to why one of John Durham’s top aides - Nora Dannehy - resigned from the investigation of the process by which the FISA warrant process was corrupted, of who did what wrong at the DOJ. That investigation has already produced one guilty plea, that of Kevin Clinesmith, a former FBI lawyer.
Claiming no inside knowledge, the author argues Dannehy may have headed the so-called “Garrity” filter group whose work concludes before that of the main team building indictments and prosecutions. The explanation, which I found interesting, is legalese “inside baseball,” important to justice, but whose work when done properly remains invisible.