Even the DOJ itself had 'no-go zones'. The DOJ National Security Division preempted any DOJ IG investigation into the NSD; back in 2015, Sally Yates wrote a 58-page legal explanation telling the IG they couldn't have any access to the NSD . . . Until Trump's declassify / cooperate memo, the NSD was essentially exempt from oversight -- even by the DOJ itself.
Yates memo: https://www.ignet.gov/sites/default/...7-20-15%20.pdf
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