In a dark suit and a formal white shirt, cheered on by a claque of appropriately enthusiastic activists, Tzipi Livni presented herself to the reporters today to announce her return. It is no wonder there was a sharp odor of deja-vu in the air; hang on a minute, did she even leave half a year ago? The failure to lead Kadima in the opposition, three years of treading water and the loss to Shaul Mofaz in the...