Unsubstantiated? Have you checked Michael Smith's website??? There are so many scanned documents there relating to the AWU issues.
I suspect if Gillard had never lunged for power as PM, the missing half a million of union funds would have probably remained safely under the carpet.
What is unsubstantiated was a punch that no-one saw land and one word against another. And yet you lefties carried on and on ad nauseum about this and yet you guys seem to turn a blind eye to the real elephant in the room.