During World War Two went to London, at Jabotinsky's request, to run a Zionist weekly intended to encourage the establishment of a Jewish Battalions within the British army.
In 1946 he returned to Eretz Israel and a year later, became a member of the Irgun General Headquarters. Focused on propaganda and overseas contacts.
One of the founders of the Herut movement and a member of the First Knesset.
In 1951 retired from political life and became a publisher (Karni publishing house).
In 1977 was asked by the Prime Minister, Menahem Begin, to become his adviser on propaganda.