Several, according to Haviv Rettig Gur:
The Israeli left, to be sure, did better than it has done in almost a generation. It rallied around the Labor party, energized the base, [and] sent thousands of volunteers to “get out the vote.” And it lost. Spectacularly. . . . The right learned that Likud is its great indispensable party, the big tent to which it rallies in times of danger. That ethos of underlying unity among the usually bickering factions of the right headed off . . . the left’s most potent challenge in almost two decades. . . .
Overall turnout spiked in this election, and the smart money held that this rise would favor the left. It was leftists, after all, who have been missing from previous elections. But in the wake of Likud’s stunning surge in the final count, a surge predicted by no poll and no pollster, the simple fact is inescapable: right-wingers came out to vote, right-wingers who haven’t bothered to vote in recent elections, right-wingers who did not like or support Netanyahu —all felt compelled to save Israel from the prospect of a left-wing victory. . . .
Why did turnout rise so dramatically? Simple: the majority of the Israeli electorate continues to distrust the left’s judgment. It is a trust deficit rooted in a more general distrust of Palestinian intentions, of the Obama White House, and of other touchstones of left-wing policy. In hindsight, it may be one of the bitter ironies of this campaign that Labor’s own slogan, “It’s us or him,” may have done as much to guarantee Netanyahu victory as anything Netanyahu may have done.
Read more on Times of Israel: http://www.timesofisrael.com/after-electoral-trouncing-what-future-for-the-israeli-left