The Centrists trace their history to the major centrist and Christian-democratic political parties in the Fourth and Fifth Republics. The parties maintained a separate existence from the Gaullist parties in the early years of the Fifth Republic primarily because of de Gaulle's strong opposition to European integration. However the major centrist party, the Union for French Democracy (UDF), began to lose importance after UDF leader Valéry Giscard was defeated by François Mitterrand in the 1981 presidential election and as the Gaullist Rally for the Republic (RPR) become more pro-European during the 1980s and 1990s. In 2002, the RPR suggested a merger with the UDF but then-UDF leader Francois Bayrou refused. The RPR itself merged with smaller parties in 2002 to become the Union for a Popular Movement (UMP). At the same time, the UDF served as a junior partner for the UMP and supported UMP governments. UMP prime ministers usually appointed several UDF politicians to their governments to cement that support. In 2005, Bayrou became increasingly critical of the UMP government and ended his support of the Gaullist party in 2006. In the 2007 elections that followed, most UDF deputies running for reelection ran with the UMP in order to gain UMP support and ensure their prospects of reelection. The remains of the UDF renamed itself the New Centre and succeeded in electing 22 deputies to the National Assembly. Bayrou opposed the alliance with the UMP and formed a new party, the Democratic Movement (MoDem).