In the 1990s and 2000s, UPR consistently had the support of 1–2% of voters in general elections, too low to receive public funding under Polish electoral law. As a consequence, it has faced prolonged financial difficulties since its inception. In the 1991 legislative election, the party won 3 seats.
UPRs candidates commenced their political campaign from its short-lived satellite party Janusz Korwin-Mikke's Platform ("Platforma Janusza Korwin-Mikke"). The PJKM also did not manage to cross the required 5% threshold in the 2005 parliamentary elections (it got only 1.57%).
In the parliamentary election in 2007, the UPR candidates campaigned in cooperation with the League of Polish Families but did not enter into a formal coalition. The list on which both the UPR and the League appeared saw the UPR get 1.5% votes. This was insufficient to get any of their candidates into the lower house ("Sejm") and therefore the UPR remains unable to obtain public funding.
At the end of 2015, UPR leader Bartosz Józwiak left National Movement which ended the partnership between these parties.
In the 2019 election, UPR left Kukiz'15, because it did not want to join the coalition with Polish People's Party. It created its own parliamentary group which consisted of four members that existed till the end of the 8th Sejm. Some of UPR associated members were candidates of Law and Justice party in 2019 election.
^ abcBasista, Jakub (2005), "Poland", in Carlisle, Rodney P. (ed.), The Encyclopedia of Politics: The Left and the Right, Sage, p. 819
^Tóka, Gábor (1997). Political Parties in East Central Europe. Johns Hopkins University Press. p. 127. {{cite book}}: |work= ignored (help)
^ abHloušek, Vít; Kopeček, Lubomír (2010), Origin, Ideology and Transformation of Political Parties: East-Central and Western Europe Compared, Ashgate, p. 115
