The new party adopted a federalist and progressivist program, and became one of the most vocal advocates of Slovenian autonomy within Yugoslavia.
However, the Slovene Peasant Party never gained the popularity of its Croatian counterpart.
Although it gained substantial support in some areas in Slovenia (especially in parts of Slovenian Styria and in Lower Carniola), it remained far behind the conservative Slovene People's Party, its main political adversary.
After the establishment of the January 6th Dictatorship in 1929, the Slovene Peasant Party was dissolved.
In many areas, they formed the core of the Slovenian partisan resistance during World War II.