The PUP was established in 2014, with its founders including House of Representatives member James Emmanuel Nuquay and Senator Henry Yallah, and was joined by Senator Sumo Kupee after he was defeated in the Unity Party primaries. It won a single seat in the December 2014 Senate elections, with Jim Tornonlah elected in Margibi County.
- Bolet, Supuwood win PUP primary for Senatorial race Archived 2014-12-27 at the Wayback Machine Front Page Africa, 14 July 2014
- Liberia: Nuquay States PUP's Mission AllAfrica.com, 21 July 2014
- Liberia: Disagreeing With the New Party's Characterizations AllAfrica.com, 14 July 2014