there are a chain of custody issues. there are preservation of materials and documents issues. there are exfoliation of evidence issues and one should be concerned about the national security implications of former secretary clinton using exclusively personal email accounts for the conducting of official u.s. foreign policy. >> that committee was expected to hear from her at least once and she's given every indication she'll cooperate with the committee and testify. chairman gowdy says maybe they need to talk to her twice. >> had you had a situation, democrats were pretty confident that the benghazi investigation had gone away or at the very least had been so partisan that it wasn't necessarily going to be a big problem. i think the issues he raises they're talking about the security concerns i think that's going to be a very you know sort of line of argument that you hear over and over again. and this just gets at her entire record as secretary of state. how much do we know how much do we know about who she has been