He was opposed to Israeli settlement activity and was among the first to praise the Oslo Accords and talks with the PLO. In his speeches and essays he frequently attacked the non-Zionist left and always emphasized his Zionist identity. He was perceived as an eloquent spokesperson of the Zionist left. When Shimon Peres retired from leadership of the Israeli Labor Party, he is said to have named Oz as one of three possible successors, along with Ehud Barak (later Prime Minister) and Shlomo Ben-Ami (later Barak's foreign minister). In the 1990s, Oz withdrew his support from Labor and went further left to the Meretz Party, where he had close connections with the leader, Shulamit Aloni. In the elections to the sixteenth Knesset that took place in 2003, Oz appeared in the Meretz television campaign, calling upon the public to vote for Meretz.