Faux comm sec and opsec if this is a compromised system at the top— as in val jarrett and her “gal pals”.
Really— brennan, and jarrett— they couldn’t possibly be.... nawwwwh. Who vetts the vetters? This is like sci-fi.
If you intend to influence your opposition (assuming that you ARE in opposition, which is debatable as you noted) do you remind them that you are reading their mail? If you are actually reading their mail that is? There are many communication techniques which are quite a bit more opaque to the NSA and other signals intelligence collection agencies than email or telephony. Human couriers to name one. More on sources and methods I’ll decline to elaborate on an open channel.