President of the Senate (Australia)
The position is provided for by Section 17 of the Constitution of Australia. The Senate elects one of its members as president at the start of each new term, or whenever the position is vacant. This is usually—though not necessarily—a member of the party or coalition that holds the most seats in the Senate. The largest party in the Senate is not always the governing party, as government is determined by the House of Representatives. The President of the Senate and the Speaker of the House of Representatives may consequently be from different parties.
Katy Gallagher
On 5 December 2014 Gallagher announced she would resign from the territory parliament, and run to replace Kate Lundy in the Australian Senate. On 11 December 2014 she resigned as Chief Minister and Andrew Barr was elected as her replacement. She was appointed to the Senate by the ACT Legislative Assembly on 25 March 2015, a day after Lundy's formal resignation, and was formally sworn in on the 26th.