Allowing Israel Beiteinu leader Avigdor Lieberman to join Prime Minister Ehud Olmert's coalition is Labor chairman Amir Peretz's only regret, Peretz told a rally of supporters on Saturday night. Peretz said he did not regret accepting the Defense portfolio because of his impact on socioeconomic issues in the army and his desire to prove that a minister who is not a former general could succeed in the post. He said he did regret not fighting Labor ministers who insisted in remaining in the cabinet when Lieberman joined. "My only political decision that I regret is not causing a coalition crisis over Lieberman," Peretz told the crowd. "That's where I think I made a big mistake. I shouldn't have let [Lieberman's joining happen]. Even if I would have been a minority in the party and even if I would have been the only one to vote against in the government."