From RedState :
Armstrong asked R Street Institute Senior Fellow Paul Rosenzweig  if he agreed with that.
Rosenzweig replied, “I agree, though I would say that nothing in the statute prevents [the attorney general] from asking a court for permission to provide that rule 6(e) material.”
Armstrong said, “I agree with that, but nothing in the statute or authority compells him to do that and a subpoena doesn’t compell him to go to court.”
Rosenzweig agreed. “A subpoena surely does not compel him to go to court.”
- “RedState”: https://www.redstate.com/elizabeth-vaughn/2019/05/19/democratic-witnesses-admit-release-full-mueller-report-require-ag-barr-break-law/
- “Paul Rosenzweig”: https://www.rstreet.org/team/paul-rosenzweig/