Earlier quoted context omitted.
Ok, so I'll put aside for a moment the fact that she lied directly to the FBI when the former Secretary of State told them that she didn't know that "C" meant classified, along with the myriad criminal pay-to-play issues that the FBI has simply ignored, both of which are slam-dunk federal felony cases. The law provides for criminal charges when someone uses gross negligence in the mishandling of classified materials…
(C), as a portion marker in a classified document (which it would properly only occur in if the document itself was at least as highly classified, with banners marking the classification in full words) means "confidential", not "classified". In email, the banner text is placed at the top and bottom of the body (the subject line of a classified email is portion marked to indicate the classification status -- including…
There's also a point there that intentional negligence is a contradiction in terms. If something is intentional, it's not negligent. If it's negligent, it can't be intentional.