Career
Born in the Russian Empire in what is today Latvia, Bash made aliyah to Mandatory Palestine in 1938. He joined kibbutz Kfar Blum, where he remained a member until 1956. He was on the Mapai list for the 1949 Knesset election, but missed out on a seat.
In 1950 he became director of Mapai"s youth department, a position he held until 1953.
He entered the Knesset on 21 May 1951 as a replacement for Yosef-Michael Lamm, who had resigned, but lost his seat in the July 1951 elections. In 1954 he became General Secretary of Mapai, serving until 1956.
Between 1962 and 1966 he served as the party"s secretary. He also served on the secretariat of the Tel Aviv-Yafo Workers Council.
He died in 2000 at the age of 87.