After the 9 June coup d'état in 1923 its organizers from the Military Union and the People's Alliance tried to create a new party in order to ensure stable political and parliamentary basis for the new government.
For that purpose they relied on the member parties of the Constitutional Bloc whose leaders were imprisoned by the government of Aleksandar Stamboliyski.
After the dissolution of the Constitutional Bloc in the end of July and the beginning of August, the Democratic, the Radical Democratic and the United People's Progressive Party created a coalition Union for Democracy.
One of them, led by Aleksandar Tsankov was connected with the formed People's Alliance, while the other two, headed by Andrey Lyapchev and Atanas Burov were linked to the traditional parties - the Democratic and the United People's Progressive parties.
After the loss of the 1931 elections those contradictions became stronger and in the spring of 1932 the fraction of Aleksandar Tsankov left the party.