re: Can Barr arrest Nadler...

quote:

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“to government personnel,” and “intelligence and national security information to government officials.”

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But those do not apply here.

Your source is clear: "Nevertheless, the rule of grand jury secrecy is subject to a number of exceptions, both codified and judicially crafted, that permit grand jury information to be disclosed in certain circumstances (usually only with prior judicial authorization)."

This is a case where Judicial Authorization IS REQUIRED.
It has not been attained. Nadler has not even made the request of the Courts, probably because he knows what their answer would be.

Instead, Nadler is insisting on UNAUTHORIZED release of the material by the USAG, which would be a crime.

To use your words, "this is clearly an illegal command."