Union, Progress and Democracy was a Spanish political party founded in September 2007 and dissolved in December 2020. It was a social-liberal party that rejected any form of nationalism, especially the separatist Basque and Catalan movements. The party was deeply pro-European and wanted the European Union to adopt a federal system without overlap between the European, national and regional governments. It also wanted to replace the State of Autonomies with a much more centralist, albeit still politically decentralized, unitary system as well as substituting a more proportional election law for the current one.

The 2008 Spanish general election was held on Sunday, 9 March 2008, to elect the 9th Cortes Generales of the Kingdom of Spain. All 350 seats in the Congress of Deputies were up for election, as well as 208 of 264 seats in the Senate.