 In December 2007 the party merged with the Social Democracy Party ("Partidul Democraţiei Sociale", PDS) of former prime minister Dumitru Braghiș.Some representatives of the Centrist Union of Moldova joined the new party, too.They didn't agree with the decision of their leader, Mihai Petrache, to abandon the process of negotiation regarding the unification of social democrats that had started some months before.