Leader of the Government in the Senate (Australia)
The current Leader of the Government in the Senate is Mathias Cormann. The current Deputy Leader of the Government in the Senate is Simon Birmingham, who was appointed on the same date following the resignation of Mitch Fifield.
Australian Senate
Senators normally serve fixed six-year terms (from 1 July to 30 June). At most federal elections, the seats of 40 of the 76 Senators (half of the 72 Senators from the six states and all four of the Senators from the territories) are contested, along with the entire House of Representatives; such an election is sometimes known as a half-Senate election. The seats of Senators elected at a half-Senate election are not contested at the next election, provided it is a half-Senate election. However, under some circumstances, the entire Senate is dissolved early, in what is known as a double dissolution. Following a double dissolution, half the Senators representing states serve terms ending on the third 30 June following the election (slightly less than three years) and the rest serve a six year term. The term of Senators representing a territory expires at the same time as there is an election for the House of Representatives.