First, sundance offers a general theme:
What we find in the Barr letter about the Obstruction investigation is blood boiling. Here Team Mueller intentionally politicize their non-finding in an attempt to open the door for Nancy Pelsoi and Jerry Nadler to exploit an impeachment angle.
We all expected that, of course, but it's worth the reminder. But then sundance moves on to what's really good news:
Team Mueller intentionally tells AG Barr they cannot make a determination of obstruction, and thereby force Barr to make the decision; and make it look political.
In my opinion it’s almost certain AG Barr saw this coming, which is why he forced DAG Rod Weaselstein to stick around, share in the decision and deflect the politics.
Sundance has an excellent point here, and it includes the very good news that we have an AG in Bill Barr who is shrewd and deft in dealing with underhanded legal tactics. If clownish conmen like Nadler and Schiff think Barr will be an easy mark for them, they need to rethink that--or, better, maybe their too deluded to do the necessary rethinking.