Herzog will of course be able to count on Meretz which is far left not centre left but why should Lapid & Livni join him force an election? Livni is comfortable in the role she currently has in the coalition & Lapid will try and be all things to all people as he always has done, he certainly won't try make so much trouble that government cannot get anything done and force an election because he knows he is unlikely to get so many seats ever again. Netanyahus success as a PM depends on what your political opinion,so whilst Amir Oren might believe Netanyahu is a failure other people might think he is the greatest PM the country has ever been lucky enough to have.
Hungary's Orban: Refugees threaten Europe's Christian roots (Reuters)
from the article: If they will it, Israel’s center-left parties can rule