The Yugoslav Democratic Party, State Party of Serbian, Croatian and Slovene Democrats and Democratic Party, also known as the Democratic Union was the name of a series of liberal political parties that existed in succession in the State of Slovenes, Croats and Serbs and the Kingdom of Serbs, Croats and Slovenes (later the Kingdom of Yugoslavia). History Yugoslav Democratic Party The Yugoslav Democratic Party () was a Slovenian liberal political party, founded in June 1918 from the merge of all three Slovene national liberal parties that had been formed since the 1890s in the Slovene-speaking parts of Austria-Hungary: the National Progressive Party in Carniola, the National Party in Styria, and the National Progressive Party in Gorizia and Gradisca. Prominent members included Ivan Tavčar, Ivan Hribar, Albert Kramar, Gregor Žerjav, and Milko Brezigar. State Party of Serbian, Croatian and Slovene Democrats In the Spring of 1919, in Sarajevo, the State Party of Serbian, Croatian and Slovene Democrats (, Državnotvorna stranka demokrata Srba, Hrvata i Slovenaca) is created by a merger of the Yugoslav Democratic Party with Serbian and Croatian liberal parties, namely the Independent Radical Party led by Ljubomir Davidović, the fractions of Serbian Progressive Party, the People's Party of Croatia and the Svetozar Pribićević's Croat-Serb Coalition, as well as fractions of Montenegrin People's Party led by Andrija Radović. The elected president of the party was Ljubomir Davidović, also a president of the Assembly and a mayor of Belgrade. The party won the largest number of deputies in the first elections held in 1920: they could occupy 92 of the 419 seats in the constituent assembly. From 1 January 1922 on, they participated in the government of Prime Minister Nikola Pašić of the People's Radical Party. Together with the People's Radical Party, the Democrats were the main supporters of the constitution passed on 28 June 1921. Members of the Democratic Party were significantly involved in the foundation of the Organization of Yugoslav Nationalists (ORJUNA) in 1921. In the 1923 elections, the party's number of deputies in the National Assembly dropped to 51. In May 1924, the Democrats joined the Oppositional Bloc against the Pašić government, appealing for a democratic Yugoslavia and calling for a fair share in the government for Croatians and Slovenes. Democratic Party In early 1924, Prime Minister Pašić succeeded in winning the support of some Democratic deputies around Svetozar Pribićević, to reject especially the Croatian demands for more