The party was founded by, amongst others, Carlos Sobisch, Elías Sapag, Felipe Sapag and his brothers, Peronists who had been discriminated against by the military government. It began on 4 June 1961 and has held the Neuquén governorship and many of the local and national legislative positions since then.
Jorge Sobisch, son of Carlos Sobisch, was a candidate for the presidency of Argentina at the 2007 elections, having been a high-profile governor of Neuquén. Sobisch resigned the presidency of the MPN in December 2007.[10][11] The party has seen internal rivalry between the Sapag and Sobisch families, along a left-right political split.
