However, after the failure of the Yugoslav government to implement the concordate with the Holy See, the Croatian Catholic Movement became strictly pro-Croatian.
[1] At the 1920 elections for the Constitutional Assembly, the party achieved relative success, winning 46,599 votes and nine seats.
[1] Together with the Slovene People's Party (SLS) and the BŠS, the HPS formed the Yugoslav bloc in the Constitutional Assembly.
In the terms of the parliamentary activity, the HPS viewed that it should be part of the Yugoslav bloc, and only from there to form wider political coalitions.
On 3 January 1923, the main Croatian political parties, the HRSS, the HPS and the HZ, agreed to compete jointly in the election.