Each week of the 2019 Australian federal election campaign, Guardian Australia takes a quick look back at the hot topics. Week three began with a combative, half-hour interview with Barnaby Joyce which failed to shed any light on a Murray-Darling water deal. Bill Shorten was more polite, but not much more forthcoming, on Labor's approach to Adani. On the other hand, there was a heap of sport and plenty of circus action