None of this e-mail business is going to matter until they have the goods. Of course she's going to “impede discovery”....it works to distract and manipulate people...which she's already doing a fine job of....the Clinton's aren't armatures when it comes to “Playing hide and seek” and “pulling the covers over every-ones heads”.
If Bengazi didn't get her this e-mail stuff won't go anywhere until they have them in hand...and then she can have her attorneys fight to keep them from being released indefinately. Like Obama has all his stuff.