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There's more about that decision here, including a link to the judge's opinion.
The US Supreme Court [official website] acknowledged in Hamdi v. Rumsfeld [opinion, PDF] that the district courts would have to address and define the scope of the government's detention authority "as subsequent cases are presented to them." Other federal judges in the District of Columbia have upheld the "substantially supported" standard proposed by the Obama administration. {which this judge rejected}
http://jurist.law.pitt.edu/paperchase/2009/05/federal-judge-rejects-new-government.php