sentences:  In September 2007, Forum Ermua president Mikel Buesa announced their intention to participate in the political party arising from Plataforma Pro; he resigned in 2009 due to disagreements with Rosa Díez.At a 29 September 2007 meeting in the auditorium of the Casa de Campo in Madrid, the new party was formed.Participants in its formation included Catalan dramatist Albert Boadella, Basque philosopher Fernando Savater, Peruvian writer Mario Vargas Llosa and Rosa Díez.