Tzipi Livni parties to agree to join a new coalition under Prime Minister Benjamin Netanyahu, forming the thirty-third government of Israel. According to the coalition agreement negotiated between Hatnuah and Likud, Livni was appointed justice minister, as well as chief negotiator with the Palestinian Authority. As environmental issues constituted a central plank in Hatnuah's platform, Livni required her party be given the environmental protection ministry, to which she appointed Amir Peretz. Fulfilling her constitutional duty as Justice Minister, Livni served as chairwoman of the powerful Ministerial Committee on Legislation. Given her clout and experience with Western leaders, Netanyahu unofficially charged Livni with
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