Durham was appointed in October 2017.
What mandate expires?
The invisible mandate of the looming election. I do not see Barr having the political capital to withstand accusations of trying to influence the election for Trump by continuing the investigation past Labor Day to snare a big name. I am sure we might see a low level official indicted on a "process" crime, but that will be it. Durham appears to be an honest broker in the search for justice. The question becomes is Barr simply running cover for the Deep State.