State-run radio and TV are operated by the official broadcasting service SODRE. Some newspapers are owned by, or linked to, the main political parties. ''El Día'' was the nation's most prestigious paper until its demise in the early 1990s, founded in 1886 by the Colorado party leader and (later) president José Batlle y Ordóñez. ''El País'', the paper of the rival Blanco Party, has the largest circulation. ''Búsqueda'' is Uruguay's most important weekly news magazine and serves as an important forum for political and economic analysis. Although it sells only about 16,000 copies a week, its estimated readership exceeds 50,000. ''MercoPress'' is an independent news agency focusing on news related to Mercosur and is based in Montevideo.