"In looking back into our investigations into the mishandling or removal of classified information, we cannot find a case that would support bringing criminal charges on these facts," Comey said. "All the cases prosecuted involved some combination of: clearly intentional and willful mishandling of classified information; or vast quantities of information exposed in such a way as to support an inference of intentional misconduct; or indications of disloyalty to the United States; or efforts to obstruct justice. We do not see those things here."
Sounds a lot like the circumstances of this case.