Tzur was born in Israel in 1969. He entered politics in 1990, joining the Labor Party. In later years he served as coordinator of the party's faction at the Knesset (under Prime Minister Yitzhak Rabin), political advisor to minister Binyamin Ben-Eliezer, and director of an association for discharged soldiers. He was placed 28th on the Labor Party list for the 2003 elections, in which the party won 19 seats. However, he entered the Knesset on 22 January 2006 following the resignation of Salah Tarif, serving during the last three months of its term.