Why is Barr getting involved?
He wants to do everything but his job. Fat Sessions.
You really asked that? O.k. FYI
https://www.justice.gov/jmd/organization-mission-and-functions-manual-attorney-general
Note No.1: Represent the United States in Legal Matters.
One of the main functions of the U.S. Attorney General is to represent the U.S. government in court proceedings.