See the Article on ZDnet.com. I would call this Careless Disregard for the Safety and Security of the country.  Some quotes from the article below:

“Ironically, it appears that Secretary Clinton’s insistence on the use of her personal email system had an unintended consequence: much of her email to State Department staff wound up in their spam bins.” “Department employees must use agency-authorized information systems to conduct normal day-to-day operations because the use of non-Departmental systems creates significant security risks.” “…we assess it is possible that hostile actors gained access to Secretary Clinton’s personal e-mail account.” “110 e-mails in 52 e-mail chains have been determined by the owning agency to contain classified information at the time they were sent or received. Eight of those chains contained information that was Top Secret at the time they were sent; 36 chains contained Secret information at the time; and eight contained Confidential information, which is the lowest level of classification.”

http://www.zdnet.com/article/investigating-hillary-clinton-more-than-extreme-carelessness-a-willful-and-systemic-disregard-for/?ftag=TRE17cfd61&bhid=22193863556109502702970333497805