Ya'akov Dov "Ketzele" Katz is an Israeli politician. He led the National Union party from 2008 to 2012, for whom he was a member of the Knesset, and is also the executive director of Beit El yeshiva Center Institutions and Arutz Sheva.

The National Union was an alliance of right-wing and nationalist political parties in Israel. In its final full form, the alliance consisted of four parties: Moledet, Hatikva, Eretz Yisrael Shelanu, and Tkuma. Leading up to the 2013 Knesset elections, only Tkuma remained, and joined The Jewish Home. During its existence, it had also included Ahi, Herut – The National Movement, the Jewish National Front, and Yisrael Beiteinu.