The erased email thing has to do with her duties as Secretary of State and handling of secret documents while performing her duties. She went outside Whitehouse protocols and set up for her convenience a personal server. (these were her words). This server did not have classified clearance and it has been argued that it was hacked while in service. The problem with deleting emails is that it makes you wonder, if documents were found on it listing top secret security assets and locations, what was in the over 33,000 her staff deleted? It shows a reckless disregard for those who serve this country and the military to treat high level sensitive information in this way.