The two, however, continued to cooperate, and were reunited fully by the created of the Radical Liberal Party in 1932.
The PRL was a part of the Luxembourgian government from 1932 until 1938, as the junior partner to the Party of the Right, which dominated inter-war politics.
The PRL continued to exist until the political realignment brought about by the German occupation during Second World War.
Leading members of the party included Nicolas Braunshausen, Gaston Diderich, Norbert Dumont, Étienne Schmit.
Diderich was the Mayor of Luxembourg City for the duration of the party's existence, whilst the other three all held cabinet positions.