Barr abused power by changing Justice Department policy with regard to investigations into election related issues, with no basis for doing so, other than Trump and Rudy saying there is fraud. And what does he conclude with, they have found nothing significant (his own conclusion does nothing to help his case that changing policy was proper).
Saying Barr has impeccable credentials is not possible anymore. His change of policy here was a clear politically motivated action. I thought these guys take an oath of office. So much for law and order.