2012 Kadima leadership election would offer her a position if he was prime minister. Citing his four decades of military service and participation in four wars, he said that he would "make the utmost effort to achieve peace with [Israel's] neighbors". He also said that non-participation in the military service was a growing problem and that Israel must reform its system of governance. Previously in support of unity, Mofaz declined to join a Netanyahu government. He was confident that he could change the course of Kadima and take it to victory. Livni picked up the endorsements of 12 MKs and two party functionaries, while
Tzipi Livni Livni and Shaul Mofaz emerged as the main rivals for the leadership. Livni won the Kadima leadership election by a margin of just 431 votes (1%). Palestinian peace negotiators were reportedly pleased with the result. As the new leader of the ruling party, Livni became prime-minister designate. Upon declaring victory, she stated "the national responsibility (bestowed) by the public brings me to approach this job with great reverence." On 21 September 2008, Olmert formally resigned in a letter submitted to president Shimon Peres, and the following day Peres formally asked Livni to form a new government. Livni faced tough negotiations