Is that the Grassly FISA authorization letter previously mentioned? I skimmed it, but was unable to translate the legalese.
basically grassley is challenging the authority of the special counsel and demanding documentation by may 31 from rosenstein including answers to 16 comprehensive questions...bada bing..
Yes, it is.
He's challenging Rosenstein on the appointment, period, as well as on the scope of authority that Mueller has exercized.