The Supreme Court has already shown its skepticism of the Bush administration’s war-on-terror policies through a series of rulings vindicating the rights of Guantanamo detainees and “enemy combatants.”

On Wednesday, another aspect of the administration’s policies drew criticism from at least some justices: the roundup of Arab-Americans and Muslims that the government said had some terrorist connection, in the immediate aftermath of the Sept. 11, 2001, attacks. But the Court seemed unlikely to act on that skepticism and expose top government officials to personal liability for their role in ordering and administering the roundup.