From IJR:

Three of the witnesses — Yeshiva University law professor Kate Shaw, R Street Institute Senior Fellow Paul Rosenzweig, and Georgia State University law professor Neil Kinkopf — all agreed that the attorney general would have been in violation of the law if he had released the full report.

Shaw said that she believed that “the law protects grand jury material” and sided with Armstrong that the release of the full report would have violated federal statute.

Rosenzweig also agreed with Armstrong but stated that there was nothing preventing Barr from “asking a court for permission” to hand over the classified grand jury documents.

“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 fired back at Rosenzweig, agreeing with the witness but proclaiming that “nothing in the statute” or congressional authority “compels” Barr to hand over the 6(e) material while stating that “a subpoena surely does not compel him to go to court.”

Rosenzweig agreed with Armstrong’s assertation, echoing the North Dakota congressman.