Mr SHORTEN (Maribyrnong—Leader of the Opposition) (14:32): My question is to the Prime Minister. The Prime Minister has just confirmed that he was aware in August that Senator Day's election possibly contravened the Constitution. How can it be that since then, for every single day that the 45th Parliament has sat, the Prime Minister has been aware that the composition of the Senate was potentially illegitimate? Why did the Prime Minister decide to keep this information secret from the Australian people?