The development is also the latest legal setback in civilian attorney efforts to put a spotlight on a series of Guantánamo-related issues in the federal courts.
On April 2, the justices decided not to prematurely step into a legal battle over whether captives should be allowed to challenge their confinement in District Court, through habeas corpus petitions -- a power stripped away by Congress.
Now, Bush administration lawyers are seeking to further limit attorney-client contacts at Guantánamo.
In the latest Supreme Court development, it was Hamdan's military commission case that led to a repudiation of the Bush administration last year in the Supreme Court. The court ruled in favor of Hamdan, declaring President Bush's system of military commission trials violated U.S. and international law.
Subsequently, the Bush administration and its Republican allies on Capitol Hill pushed through a law reconstituting the military commissions, giving them the congressional imprimatur that had been missing from the earlier system created by executive order.