Israel's Prime Minister Benjamin Netanyahu, Isaac Herzog and Tzipi Livni are depicted on Likud (R) and Zionist Union (L) campaign billboards in Tel Aviv March 15, 2015. Israel's centre-left opposition is poised for an upset victory in next week's parliamentary election, with the last opinion polls before Tuesday's vote giving it a solid lead over Netanyahu's party. REUTERS/Baz Ratner (ISRAEL - Tags: POLITICS ELECTIONS)