Arnaldo Otegi, leader of the outlawed Batasuna party and considered a key figure for possible peace talks between the Spanish government and the armed Basque group ETA

Otegi is a former ETA member and his role in the peace process is expected to be negotiating with the other Basque political parties on reconciliation and such like, while ETA negotiates with the National government on disarmament and the status of ETA prisoners. The apparent leader of ETA is Josu Ternera. Otegi (or batasuna generally) is not supposed to negotiate with the Spanish goverment: that's what ETA will do.

A society committed to the notion that government is always bad will have bad government. And it doesn't have to be that way. — Paul Krugman