federal budget which came amidst the fallout from the global financial crisis. In June 2009, Godwin Grech, a Treasury civil servant, privately contacted Turnbull, alleging that a car dealer with links to the Labor Party had received preferential treatment under the OzCar program, sparking the 'OzCar affair'. Turnbull later repeated these allegations in Parliament, stating that Prime Minister Kevin Rudd and Treasurer Wayne Swan had "used their offices and taxpayers' resources to seek advantage for one of their mates and then lied about it to the Parliament" and that they needed to "either explain their actions or resign". On 22 June, the email Grech had secretly provided to Turnbull supporting allegation was alleged to have been faked by Grech. Grech subsequently admitted the forgery, with an Australian National Audit Office inquiry on 4 August clearing both Rudd and Swan of any wrongdoing. The resulting embarrassment of having repeated false allegations, as well as Turnbull's demeanour throughout the OzCar affair, was judged as the cause of a subsequent significant decline in his approval ratings in opinion polls. On 24 November 2009, Liberal and National MPs and Senators met to discuss the Rudd government's proposed Carbon Pollution Reduction Scheme (CPRS). Turnbull announced that his policy would be to support the CPRS, despite significant disagreement among his colleagues. In response, Liberal MPs Wilson Tuckey and Dennis Jensen looked to move a leadership spill motion, intending to nominate Kevin Andrews as a challenger to Turnbull. While this attempt failed, increasing numbers of MPs and Senators publicly criticised the position, with several resigning from the Shadow Cabinet, including Tony Abbott. On 1 December 2009, just one week after Turnbull announced the policy on the CPRS, Abbott announced he would challenge Turnbull for the leadership. Though initially regarded as having little chance of success, with Turnbull stating in public that Abbott did not have the numbers to win, Abbott defeated Turnbull in the ballot by a single vote. After the shock result, Turnbull returned to the backbench and said he would serve out the remainder of his term as Member for Wentworth. On 6 April 2010, he announced he would not seek re-election to the Australian Parliament. However, on 1 May 2010 he reversed this decision saying that he had been convinced by former Prime Minister John Howard to not give up his political career. Shadow Minister (2010–2013) At the 2010 federal election, Turnbull was re-elected