referendum campaign officially started on 3 January 2012, with a declaration that it was aimed at providing to Croatian citizens clear, concise and transparent information on the EU accession negotiations and EU membership. The campaign included television promotions and addresses by leading politicians such as: the President of Croatia, Ivo Josipović; the prime minister, Zoran Milanović; the foreign minister, Vesna Pusić; other government members, such as Milanka Opačić, Radimir Čačić, Neven Mimica and Željko Jovanović; and former prime minister and opposition leader Jadranka Kosor. (All of these supported the referendum in their addresses.) A telephone information hotline was also set up, and 2.15 million EU information booklets were prepared for mailing to every household in the country. Finally, summaries of the accession treaty, negotiation documents and governmental report on the EU accession negotiations were published online, as were the original documents. It was announced that the campaign cost 4.8 million kuna ( ). The leading parliamentary political parties in Croatia have jointly supported EU accession since 2005, when a group called the Alliance for Europe () was set up as an informal alliance aimed at achieving EU membership as a strategic goal of Croatian foreign policy. Opposition to the referendum was voiced by the Croatian Party of Rights dr. Ante Starčević, a political party holding a single seat in the Croatian Parliament, claiming too little information provided to the voters, rather than the party being eurosceptic. Further opposition was voiced by several non-parliamentary parties. The most substantial opposition to the accession came from the Croatian Party of Rights (HSP), which demanded that the government fund its television campaign against EU membership. HSP also printed leaflets advocating rejecting EU accession. The party also organized other activities at 150 locations in the country aimed at the referendum proposal's rejection. During the 2011 parliamentary election campaign, HSP declared itself as the only party advocating rejection of Croatian EU accession; it failed to win a single seat, receiving 3% of the votes. Further opposition to the Croatian EU membership came from a group of non-parliamentary political parties organized as the Alliance for Croatia () claiming that the move jeopardizes Croatian independence, but the alliance's December 2011 protest in Zagreb drew only 150 people. The government's campaign was criticized as having poor promotional videos, especially lacking in informational value. The final days of the campaign were marked by events in support of and opposition to