 Singh was a prominent leader of Socialist Party until its merger with other political parties to form the Janata Party and its government in Bihar as well as in India in 1977.He was a member of the national executive of the Socialist Party from 1939 till 1977 and for many years as its state President.He won from Dehri-on-Sone in the first General Elections of 1952 and became an important opposition leader from 1952 until 1962.