The Obama State Department buried a key Benghazi-related Hillary email which would have revealed Clinton was using a private email server a year earlier than it was eventually discovered (which was also before she decided to delete the emails she claimed were personal).
In a letter to Judicial Watch dated April 18, 2016 the department released documents that it admitted they had previously withheld. If the State Department disclosed the email when first supposedly found, Clinton’s email server and her hidden emails would have been disclosed nearly two years ago, before Clinton authorized the deletion of tens of thousands of emails.
The September 29, 2012, email to Clinton from then-Deputy Chief of Staff Jake Sullivan concerns talking points for Clinton calls with senators about the Benghazi attack and is almost totally redacted. But it does contain Hillary Clinton’s private server email address. Which would have raised questions if it had been released when first discovered.