I read the arguments. The government’s argument was “Don’t worry, the power to indict the president or former president won’t be abused because:
1) Prosecutors are such good guys they would never be biased as hell or abuse their authority and
2) the Grand Jury could always deny an indictment (which is a complete joke. That “old saw” Alito sites is taught to you within your first week in law school - because its so obviously true)
When I think of DA’s and their integrity, I always think immediately of the Duke lacrosse case.