Mathias Cormann congratulates new Senate arrival Amanda Stoker, who replaces George Brandis. Mick Tsikas/AAP

VIDEO: Michelle Grattan on musical chairs in the Senate

Michelle Grattan speaks with Deep Saini about the week in Australian politics. They discuss the fallout from Super Saturday – Labor’s win in the Batman byelection against the Greens, and the Liberals’ victory over the longstanding Labor government in South Australia. They also talk about the government’s negotiations with the changed composition in the Senate to pass their tax cuts for big companies.