Tzalash was formed after MK and Infrastructure Minister Yosef Paritzky was expelled from Shinui in July 2004 after he had been caught attempting to shame Shinui's deputy leader Avraham Poraz; he had hired a private investigator to look into Poraz's affairs and "drop him in the dirt." Paritzky's actions were investigated by the police, but charges were not brought.
Shinui attempted to have Paritzky expelled from the Knesset and replace him with another Shinui MK. However, the Knesset House Committee allowed him to retain his seat. Paritzky then announced that he was forming his own party and would run in the 2006 elections, saying his goal was for Shinui "not to attain the minimum number of votes needed to get into the Knesset." Although it was possible for the faction to receive 600,000 shekels in electoral funding, Tzalash did not participate in the 2006 elections.
Despite Tzalash's demise, two of Paritzky's goals were realised; Poraz was defeated in Shinui's primary elections in January 2006, with Paritzky saying Poraz and party leader Tommy Lapid "should have been sent home long ago". In addition, in the elections, Poraz's new party, Hetz, and Shinui both failed to win any seats.
- Yuval Yoaz (18 January 2005). "State drops case against former Shinui MK Paritzky". Haaretz. Retrieved 13 January 2014.
- Gideon Alon (19 January 2005). "Panel refuses to expel Paritzky from Shinui". Haaretz. Retrieved 13 January 2014.
- Yuval Yoaz (2 January 2006). "Ousted Shinui MK Paritzky to run for Knesset". Haaretz. Retrieved 13 January 2014.
- Hilary Leila Krieger (12 January 2006). "Report: Poraz refuses offer to rejoin Shinui after quitting". The Jerusalem Post. Retrieved 21 June 2015.
- Tzalash Knesset website