Mushanov studied and worked in law before embarking on a career in politics. He was first elected to the
Sabranie in 1902. After a career as a minister in a number of governments, Mushanov came to power on 12 October 1931 following the decision of
Aleksandar Malinov to step down due to ill health. His greatest policy success came in 1932 when he managed to bring an end to the
war reparations that Bulgaria had been forced to pay. Despite this, the economy remained in a poor state, whilst his policy aims of working with
Kemal Atatürk towards reconciliation with
Turkey also upset the
right. Like most of his contemporaries Mushanov also faced the problem of dealing with the
Internal Macedonian Revolutionary Organization and followed the practice of his predecessors of opposing the group's activity, despite personally having some sympathy with their aims. Alongside this, the government was marked by internal political difficulties, notably with the governing Democratic Union splitting during his premiership and the government having to be reformed on different lines. As a result, he was overthrown in a military coup on
19 May 1934 by the militaristic
Zveno movement. ==During the war==