He served as Minister of Justice, Minister of Internal Security, Minister of Intelligence and Nuclear Affairs, and Minister in the Prime Minister's office supervising Israel's intelligence agencies Mossad and Shin Bet. He was also responsible for overseeing Israel's Atomic Energy Agency, and served as the minister in charge of Israel's strategic relationship and security dialogue with the United States. He also served as Deputy Minister of Foreign Affairs and as the Chairman of the Knesset Foreign Affairs and Defense Committee and Majority Leader of the Knesset.