During the campaign, Zapatero harshly criticized the People's Party for its management of the "Prestige" crisis, its attitude towards the invasion of Iraq and the high cost of housing. Mariano Rajoy, the new leader of the People's Party after Aznar's voluntary retirement, on his part, attacked Zapatero's foreseeable future alliances with parties like United Left or Republican Left of Catalonia (a pro-Independence Catalan party).