The 2014 election resulted in a hung parliament with 23 seats for Labor and 22 for the Liberals. The balance of power rested with the two crossbenchindependents, Bob Such and Geoff Brock. Such did not indicate who he would support in a minority government before he went on two months' medical leave for a brain tumour. With 24 seats required to govern, Brock subsequently threw his support to Labor. The Liberals were reduced to 21 seats in May 2014 when Martin Hamilton-Smith became an independent and entered cabinet with Brock. Both Hamilton-Smith and Brock agreed to support the Labor government on confidence and supply while retaining the right to otherwise vote on conscience. It is the longest-serving state Labor government in South Australian history and is the second time that Labor has won four consecutive state elections in South Australia, the first occurred when Don Dunstan led Labor to four consecutive victories between 1970 and 1977. The last hung parliament occurred when Labor came to government in 2002.
The last state election was held on 15 March 2014 to elect members for the House of Assembly and half of the members in the Legislative Council. In South Australia, section 28 of the Constitution Act 1934, as amended in 2001, directs that parliaments have fixed four-year terms, and elections must be held on the third Saturday in March every four years unless this date falls the day after Good Friday, occurs within the same month as a Commonwealth election, or the conduct of the election could be adversely affected by a state disaster. Section 28 also states that the Governor may also dissolve the Assembly and call an election for an earlier date if the Government has lost the confidence of the Assembly or a bill of special importance has been rejected by the Legislative Council. Section 41 states that both the Council and the Assembly may also be dissolved simultaneously if a deadlock occurs between them.
The Electoral (Miscellaneous) Amendment Act 2013 introduced set dates for writs for General elections in South Australia. The writ sets the dates for the close of the electoral roll and the close of nominations for an election. The Electoral Act 1985 requires that, for a general election, the writ be issued 28 days before the date fixed for polling (S47(2a)) and the electoral roll be closed at 12 noon, 6 days after the issue of the writ (S48(3(a)(i). The close of nominations will be at 12 noon 3 days after the close of rolls (Electoral Act 1985 S48(4)(a) and S4(1)).
The Liberals were reduced to 21 seats in May 2014 when Martin Hamilton-Smith became an independent and entered cabinet as Minister for Investment and Trade, Defence Industries and Veterans Affairs. Both Hamilton-Smith and Geoff Brock agreed to support the Labor government on confidence and supply while retaining the right to otherwise vote on conscience.
Liberal Iain Evans in Davenport announced in June 2014 he would resign from parliament before the next state election which will trigger a by-election.
Polling conducted by Newspoll and published in The Australian was conducted via random telephone number selection in city and country areas. Sampling sizes usually consisted of over 800 electors, while the 10–13 March 2014 poll consisted of 1602 electors. The declared margin of errors at these sample sizes were ±3.5 percent and ±2.5 percent respectively.