Yuval Diskin, the former head of the Israel Security Agency (Shin Bet), announced on Friday that he is endorsing Isaac Herzog for prime minister.
Diskin, who has established himself as a fierce critic of Prime Minister Benjamin Netanyahu since leaving his post, published a lengthy note on his Facebook page, calling on voters to "give Herzog a chance" to form the next government.
"Netanyahu has failed in every key area, and he needs to go home," Diskin wrote. "Herzog can't be any worse than Netanyahu. He can only be better. I believe Herzog will be a cautious, level-headed [leader] who will know how to rebuild Israel's relationship with the Obama administration."