Since we know that none of the Clintons have the skills to run their own email server, we need to get the administrator of the email server in to testify. He needs to publicly admit before the world that he was so incredibly incompetent that there are no backups of the server.
Congresscritter: Just to clarify, you're the person who managed the Clinton's email server?
Congresscritter: Could you please supply the committee with backups of the email server?
Admin: There aren't any.
Congresscritter: Again, just to clarify... You're actually an IT professional?
Congresscritter: And you're going to go on record, to say that this email server was not backed up?
Congresscritter: You realize Mrs. Clinton was a senior administration official whose duties involve, among other things, negotiations with foreign governments?
Congresscritter: And what would you have done if, during negotiations, the hard disk on this computer had crashed, completely wiping out her email?
Congresscritter: So you're going to state, for the record before the world that as an IT professional, you're completely and utterly incompetent?
Admin: I'm not incompetent
Congresscritter: Then provide us with the backups.