I completely agree with Joe Offer's assessment of the e-mail thing, and for the same reasons -- extensive experience with real-life government security work and the electronic tools people are expected to use when doing it. The classified "high side" Internet has its benefits, but it is not portable; users have to be in a restricted area to get at it. As Secretary of State, Mrs Clinton seemed to spend most of her life on the road, and could hardly carry a SCIF around with her.

The need for constant access to classified communications is one of the primary reasons why a task force commander of today sits in the Tactical Operations Centre, and not in the van of the assault force.

More to the point, I have never seen any indication that, through her use of a private server, Mrs Clinton divulged operationally sensitive information to any unauthorized person, let alone an adversary, or that said use contributed to any identifiable injury to the United States -- even the Benghazi attack. Consequently, she could not be charged with anything more serious than a "security violation" (i.e., an error of procedure). To prove treason, even in a Trump court, it would be necessary to produce evidence of harmful intent, and that, too, is missing.