Congress expects Clinton to testify Dec. 20 about the results of the Accountability Review Board, State’s internal review on the events leading up to and during the Sept. 11 attack on the U.S. mission in Benghazi that resulted in the death of Ambassador Chris Stevens and three other Americans. But the State Department said today that the work of the ARB, led by Tom Pickering and Adm. Mike Mullen, isn’t complete yet and so Clinton might not show up to testify next week at all. …

But State Department spokeswoman Victoria Nuland said today that the ARB is not complete, might not be complete by Dec. 20, and Clinton has not agreed to testify on Dec. 20.

“The Hill has talked about a planning date on the calendar. That presumes that the ARB is finished,” Nuland said. “That’s dependent on all of the work getting done between now and then… The ARB is continuing to do its work, to my knowledge it has not yet completed its work.”