I would be very surprised if Barr hadn’t first told POTUS that he intended to make a public statement. That would have been the courteous and respectful thing to do.
......and, I hope POTUS takes what Barr says seriously. Barr is a good AG and I don’t want to lose him.
Right now PDJT should be very focused on policy, and using his current huge momentum to get re-elected in November.
That's very much TBD right now.