Security guards stood tensely in front of the press podium while Livni answered strident questions from reporters from Al-Jazeera and other Middle East news organizations, CNN and NBC.
One reporter was physically removed from the microphone when he charged Livni was a terrorist.
A moderator from the National Press Club, where the event was held, tried to cut off another reporter who read at length from a Human Rights Watch report detailing the killing and 'murder' of Palestinian children.