Arnaldo Otegi Mondragón is a Basque politician and spokesman for the outlawed abertzale Basque separatist party Batasuna. He was one of the key negotiators during the last unsuccessful peace talks in Loiola and Geneva, in 2006. He is one of the leading figures at Batasuna's change of extrategy and ETA's end. He now is in prison accused of trying to re-organize Batasuna.
Before joining politics he had been convicted of being an ETA member and taking part in several actions, amongst which was a kidnap attempt against the Basque entrepreneur Luis Abaitúa,. In the 1990s he started his political career and he quickly gaining prominence within Basque separatism and becoming the leader of Batasuna, after the whole National Committee of Herri Batasuna was arrested. However the party and the next created ones were declared illegal in 2003 due to its relationship with ETA. In June 2007 he was convicted of "praising terrorism" and was released from prison in August the following year. In October 2009 he was arrested for attempting to put Batasuna back together, and was given a ten-year sentence.
He remains an important figure within the Basque separatist movement.