The judge also said the case would have to betriedat another court because of the danger that he and other judges at London's Blackfriars Crown Court would know some of the potential witnesses.
Archbishop Tutu said Mr Blair and former US President George W Bush should betriedat the International Criminal Court in The Hague for lying about Iraq's weapons of mass destruction in order to justify invading the country.
"If the Abu Ghaith trial does go forward in federal court, it must not be used as a precedent for future enemy combatants who should betriedat Guantanamo, " he said.