On 24 June 2010, Julia Gillard replaced Kevin Rudd as Australian Labor Party leader and Prime Minister. The replacement of a first-term Prime Minister was unusual in Australian political history and the Rudd-Gillard rivalry remained a vexed issue for the Gillard Government into the 2010 election and its subsequent term. On 17 July, Gillard called the 2010 federal election for 21 August. Polls in the first week gave a view that Labor would be re-elected with an increased majority, with Newspoll and an Essential poll showing a lead of 10 points (55–45) two party preferred.