Yair Golan accuses Labor of refusing to merge; party leader Horowitz assails rebel MK Rinawie Zoabi, says Meretz 'has no connection to that woman anymore'

Both Democratic Camp and Labor enter another campaign flirting with electoral threshold; while some want them to merge, internal politics threaten further division

As political affiliations become increasingly fluid, large parties may do well to pay heed to an Israeli hi-tech maven's statistical analysis of who is voting for whom -- and why