Hello from the federal courthouse, where the DC Circuit is set to hear arguments in a sealed grand jury matter. Politico previously reported observing someone refer to it as a special counsel matter: politico.com/story/2018/10/… Arguments are sealed, we're waiting to see who goes in
Here's what we know: The underlying grand jury matter was filed in August and there was a judgment in early October (the docket is otherwise completely sealed) 
The case first went up to the DC Circuit in September. It was dismissed for lack of jurisdiction and then the court denied en banc rehearing
The case then went back up to the DC Circuit in October, and that's the case being argued today. So far there's been nothing on the docket that could definitively identify what it is - no lawyer names, for instance
The DC Circuit is about to hear arguments in the sealed grand jury matter. They've sealed not only the courtroom, but the whole floor, so we've been moved away. Haven't recognized anyone going in earlier as being connected to Mueller's office, now we won't be able to see
We're now allowed back on the floor where DC Circuit arguments were taking place, but the courtroom area is locked and no official confirmation yet that arguments are over. No spottings of note so far (your court press corps is spread out around the building and outside)
And that's a wrap, a court employee just walked out of the courtroom area and confirmed arguments on the sealed grand jury matter have ended. No sightings so far (there are ways for people to enter/exit the courthouse that are not public)
