When will Hillary come clean?

The select committee was also the first to requestcopies of Stevens' emails in June of this year, undermining criticism that the probe is simply duplicating the efforts of previous congressional investigations.

More than one month after a high-profile hearing with Clinton, the select committee is quietlycontinuing its work with a series of private interviews involving unidentified officials.

Lawmakers conducted at least four such closed-door, transcribed interviews in November.

While Democrats on and off the panel have called for the Benghazi committee to disband amid controversy over what they perceive as a partisan agenda, the State Department still has not given investigators all requested documents.