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.
National Party of Australia
In September 2008, Joyce replaced CLP Senator and Nationals deputy leader Nigel Scullion as leader of the Nationals in the Senate, and stated that his party in the upper house would no longer necessarily vote with their Liberal counterparts in the upper house, which opened up another possible avenue for the Rudd Labor Government to get legislation through. Joyce was elected leader in a party-room ballot on 11 February 2016, following the retirement of former leader and Deputy Prime Minister Warren Truss. Joyce was one of five politicians disqualified from parliament in October 2017 for holding dual citizenship, along with former deputy leader, Fiona Nash.