I would guess that the union bosses have probably put their foot down and ordered puppet-PM Rudd to hold the election as soon as possible before anymore of Rudd's insane stunts blow up in their faces...
Rudd's re-appointment as stooge-PM is turning out to be a catastrophic mistake from the union bosses, almost as big a mistake as their appointment of Gillard as stooge-PM...
The more the public hears of Rudd's constant motor-mouthing whine and the stream of lies, smoke screens and media stunts, the more they remember the dark days of Rudd-1.0 and realize Rudd-2.0 is even worse...