yytz: If Labor has more votes, it would be mean a Labor-Likud coalition would be led by Labor. In that situation, Netanyahu would probably retire (as he did the last time the electorate “dissed” him).
Unless Netanyahu is willing to change conscription of hareidim (supported in the past by Likud, Bayit Yehudi and Yisrael Beiteinu) he losed Hareidi support. So if the anti-hareidi “Right” decides that drafting hareidim and closing yeshivos is more important than keeping Netanyahu as Prime Minister, Herzog has an opening (which will probably involve ending conscription rather than exempting hareidim, which please the Arabs and post-zionists as well).