This has been obvious for a long time, as is the utter impotence of Congressional investigations.
When Holder simply ignored their subpoenas, ignored their CONTEMPT citations ... it told us everything we needed to know.
Then there was the pathetic (Trey Gowdy) Benghazi hearings against HRC.
It is actually stupid to respond to their subpoenas if you are a political entity, because you are telling your secrets to both sides! Sessions et. al are EXACTLY RIGHT to keep their secrets away from the Leftist scumbags in Congress and their media hacks.
How does Sessions keep it from Rosenstein, who is a Black Hat? Rosenstein is tied to the hip with Hillary and Mueller. I call BS for this reason...
Who really cares about Congressional investigations? It can’t indict, it’s arrest powers are limited to contempt charges, and never used anyway, and the source of a big yawn from JQP anyway.
A grand jury is another matter entirely.