A month later , the country was proclaimed a one - party state with TANU as the sole legal party .
Julius Nyerere , leader of the ruling Tanganyika African National Union and incumbent Prime Minister won easily , claiming 99.2 % of the votes .
A month later , the country was proclaimed a one - party state with Tanganyika African National Union as the sole legal party .
Julius Nyerere , leader of the ruling Tanganyika African National Union and incumbent Prime Minister won easily , claiming 99.2 % of the votes .