Tzipi Livni position on Kadima's list of candidates, which effectively guaranteed her election to the Knesset. In 2006, Livni was appointed as Israel's Minister of Foreign Affairs. She held this position until 2009. In Ehud Olmert's government, Livni was also appointed Designated Acting Prime Minister (also known as Vice Prime Minister), taking the place of the prime minister if he or she is outside the country or temporarily or permanently unable to fulfill his or her duties. She ceased serving as Justice Minister at that time, but again held that position from 29 November 2006 to 7 February 2007, while still serving
Tzipi Livni the UN Security Council was influenced by his talks with Livni and former president Shimon Peres, who said such a move could serve the political interests of those opposing the peace process. After the dissolution of the Knesset in December 2014, Labor leader Isaac Herzog and Livni announced a joint slate between Labor and Hatnuah, called the Zionist Union, to contest the 2015 elections in an effort to keep Netanyahu, leader of the Likud Party, from securing a fourth term as prime minister. They proposed to share the role of prime minister (an arrangement known in the Knesset as rotation)