Early groups of "Olivists" were formed in 1995–1996, during the campaign for the 1996 general election, by close supporters of Prodi who were not members of any party of The Olive Tree coalition, like Prodi himself. "Clubs for Prodi" and the "Citizens for The Olive Tree" association were organised. Although most Olivists took part to the campaign only as activists, some were elected with the Populars for Prodi list, whose main constituent parties were the Christian-democratic Italian People's Party (PPI) and the social-liberal Democratic Union (UD). The Olive Tree won the election, the PPI–UD joint list obtained 6.8% of the vote, and Prodi was sworn in as Prime Minister, at the head of the Prodi I Cabinet.