In continuation with the 2004 National Union PSD+PUR alliance, the new alliance was founded in 2008 between the Social Democratic Party (PSD) and the Conservative Party (PC), formerly Humanist Party of Romania (PUR) as a counterpart to the centre-right Justice and Truth Alliance (DA) between the National Liberal Party (PNL) and Democratic Party (PD).

It took part in the 2008 general elections and in the 2009 European Parliament election, with the alliance winning 11 seats, including one Conservatives' candidate: George Sabin Cutaş.

[1] In late 2010, the Alliance dissolved, as Conservative Party (PC) joined the National Liberal Party (PNL) to form the Centre Right Alliance (ACD).

Notes: 1 National Union PSD+PUR members: PSD (46 senators and 113 deputies) and PUR (11 senators and 19 deputies).

2 Soon after the elections, PUR broke the alliance and switched sides, joining the Justice and Truth Alliance (DA) in forming the government.