Securitate officers guilty of ransacking and stealing $100,000 from the house of a leading opposition politician. Petre Roman's government fell in late September 1991, when the miners returned to Bucharest to demand higher salaries. A technocrat, Theodor Stolojan, was appointed to head an ad interim/acting government until new elections could be held. New constitution In December 1991, a new constitution was drafted and subsequently adopted, after a popular referendum, which, however, attracted criticism from international observers. The constitution was most recently revised by a national referendum on 18–19 October 2003, and took effect on 29 October 2003. In March 1992, the FSN split into two groups: the Democratic National Front (FDSN), led by Ion Iliescu and the Democratic Party (PD), led by Petre Roman. Iliescu won the presidential elections in September 1992 and his FDSN won the general elections held at the same time. With parliamentary support from the nationalist Romanian National Unity Party (PUNR), Greater Romania Party (PRM), and the ex-communist Socialist Workers' Party (PSM), a new government was formed in November 1992 under Prime Minister Nicolae Văcăroiu. The FDSN changed its name to Party of Social Democracy in Romania (PDSR) in July 1993. The subsequent disintegration of the National Salvation Front (FSN) produced the Party of Social Democracy in Romania (PDSR) (later Social Democratic Party, PSD), the Democratic Party (PD), and the ApR (Alliance for Romania). The PDSR party governed Romania from 1990 until 1996 through several coalitions and governments with Ion Iliescu as head of state. Emil Constantinescu of the Democratic Convention (CDR) won the second round of the 1996 presidential election and replaced Iliescu as head of state. The PDSR won the largest number of seats in the Parliament, but was unable to form a viable coalition. Constituent parties of the CDR joined the Democratic Party (PD) and the Democratic Alliance of Hungarians in Romania (UDMR/RMDSZ) to form a centrist coalition government, holding 60% of the seats in Parliament. This coalition implemented several critical reforms. The new coalition government, under prime minister Victor Ciorbea remained in office until March 1998, when Radu Vasile (PNŢ-CD) took over as prime minister. The former governor of the National Bank, Mugur Isărescu, eventually replaced Radu Vasile as head of the government. The 2000 election brought Iliescu's PDSR, known as Social Democratic Party (PSD) after the merger with the PSDR, back to power. Iliescu won a third term as the country's