In a stunning Friday (isn't it always?) revelation, we found out that yet another key figure from Hillary Clinton's "rat pack" -- her former chief-of-staff Cheryl Mills - was given immunity in the email server investigation. As Ed Morrissey points out, that makes "at least five" -- who knows how many there really are -- who have received this treatment. So far that's techies Bryan Pagliano and Paul Combetta (more of him in a moment), John Bentel of the Office of Information Resources Management, and Heather Samuelson, an aide to Mrs. Clinton. How much the public knows of their immunized...