Not turning over the docs means there os a Grand Jury hearing the evidence.
Mmmmmmmmmmmmm
The doj and fbi are subject to oversight, period. If they were not, you would see just what is happening now. This is the fault of a corrupted congress, they were almost all in on it.....And still are. Nunes and a few others appear to be the only ones doing their jobs. At least i hope they are and this is not all kabuki theater to placate the masses while they bring down Trump. Trump is a bold and powerful man, but he is not superman.
Doj possesses no right whatsoever to hide anything from Congress. The proof of this is that Congress could disband them this afternoon if they wanted.