Ха-Поэль ха-Цаир
The nationalist Hapo'el Hatza'ir party refused to join the new party because it was still suspicious of socialist sentiments. Therefore, the founders decided to establish the Histadrut, the General Federation of Jewish Workers. After some years of cooperation in the Histadrut Hapoel Hatzair became convinced that there was no socialist threat in Ahdut HaAvoda and in 1930 the two parties joined to form the Mapai party.