The party was founded on 19 June 2015, following a merger of the
Liberal Reformist Party (PLR) and the
Conservative Party (PC). On 19 November 2015, the party was admitted into the
Alliance of Liberals and Democrats for Europe. At the
2016 legislative election which was held on 11 December 2016, ALDE received 5.6% of the vote for the
Chamber of Deputies (consequently gaining 20 seats there) as well as 6.0% of the vote at the
Senate (consequently gaining 6 seats there). On 19 December 2016, party co-presidents
Călin Popescu-Tăriceanu and
Daniel Constantin signed a collaboration protocol with the
Social Democratic Party (PSD) leader
Liviu Dragnea to form a new coalition government with ALDE as the junior partner. On 30 May 2019, the party withdrew from the Alliance of Liberals and Democrats for Europe. The relation between ALDE Romania and ALDE Europe was strained after the ALDE-supported governmental coalition had passed laws that were deemed by the
Venice Commission and ALDE Europe to undermine the independence of the judiciary. The leader of the Alliance of Liberals and Democrats for Europe,
Guy Verhofstadt, had also previously participated at a rally of the then oppositional
USR PLUS. Eventually, ALDE Romania withdrew from their coalition with the
Social Democratic Party (PSD) on 26 August 2019 and moved into parliamentary opposition until the end of the legislature in 2020. In 2020, ALDE merged with
PRO Romania, forming a new political party under the moniker
PRO Romania Social-Liberal (). During early 2021 however, ALDE seceded from PRO Romania due to internal frictions between Ponta and Popescu-Tăriceanu as well as due to poor results from both the local and legislative elections which were held throughout the previous year. As of March 2021, ALDE is solely active at local political level in Romania, where it has a very feeble amount of mayors, county councillors, and local council councillors. It has also been in extra-parliamentary opposition to the PNL-USR PLUS-UDMR/RMDSZ government between late 2020 and late 2021. However, during early 2022, ALDE switched to an extra-parliamentary support for the current governing
grand coalition which is the
National Coalition for Romania (or CNR for short) and is currently negotiating a very probable near future merger with the PNL, but without their former president Călin Popescu-Tăriceanu, who is no longer even a member of the party. In March 2022, ALDE was officially absorbed by the PNL. == Leadership ==