Judge Napolitano also stated that Attorney General Barr cannot release any information pertaining to ongoing investigations or classified materials.
The Fox News senior judicial analyst made the case as Democrats are planning to subpoena the unredacted Mueller report, which will put the Attorney General in a position with several options.
"When the subpoena arrives, the Attorney General can ignore it. Knowing him, I don't think he will," Judge Nap said Tuesday morning on "Fox & Friends."
"He will say 'We're not going to comply,' or he will move to a federal judge to cross the subpoena and the whole thing will go from Congress to a federal judge."
He added that under United States law, there are certain details of the report that Barr is prohibited from revealing, including details about individuals connected to the investigation who have not been charged with any crime.