In 2004 , in order to maximise the Basque vote , the individual parties Aralar , Eusko Alkartasuna ( Basque Solidarity ) , Batzarre and the Basque Nationalist Party agreed to form the coalition Yes to Navarre ( Nafarroa Bai ) to contest the Navarre constituency , an area where Basque nationalism had historically been weakest . Barkos , who was not a member of any of the parties , was selected to head the list at the 2004 Spanish General Election . The list polled 17.98 % , which represented the highest vote share for any Basque list in the constituency since democracy was restored in 1977 . In Congress she worked to promote Basque language and culture in Navarre , although she was criticised by Batasuna , which was not part of the NB coalition . In Congress she was also a member of the Commission which investigated the 2004 Madrid train bombings
2004 Madrid train bombings
2004 Madrid train bombings
Uxue Barkos