Tzipi Livni and spoke to Livni, reassuring her that she was "most welcome in Britain any time." Livni's office later stated that Brown promised to seek legislative changes to ensure no Israeli official would risk arrest while on British soil. Yehuda Blum, Israel's former ambassador to the United Nations and a professor of law at Hebrew University of Jerusalem, commented: "The abuse and misuse of this concept of universal jurisdiction should be discontinued." Blum said the law was intended for use in cases with no clear jurisdiction, such as piracy in international waters, and should not be expanded for political aims. Israeli
Ehud Olmert preserve its unity and ability to lead." Defense minister and Labor party leader Ehud Barak called Olmert's announcement "a proper and responsible decision made at the right time". Opposition leaders called for the resignation to be followed by general elections. The Likud party leader, Benjamin Netanyahu, called for snap elections: "It doesn't matter who heads Kadima. They are all partners in this government's total failure. National responsibility requires a return to the people and new elections." After Tzipi Livni won the leadership election, Olmert officially resigned but remained prime minister, according to the dictates of the law. Even after an