Hillary Clinton is rumored to be putting her campaign team together, and she may announce her intention to run for president sooner rather than later. However, her handling of the controversy over her use of private emails while at the State Department has exposed one of her great weaknesses: transparency.
I hoard emails. My reason for hoarding them is simple: I might need them some day. Emails serve as written proof of a conversation. This is helpful for a number of reasons, from memory nudging and legal/historical documentation, to spousal argument proof (See, hon, I did tell you my Aunt Rose was coming to town).