For example, under authority it already has or is asserting in court cases, the administration, with approval of the special Foreign Intelligence Surveillance Court, could order a clandestine search of a U.S. citizen's home and, based on the information gathered, secretly declare the citizen an enemy combatant, to be held indefinitely at a U.S. military base. Courts would have very limited authority to second-guess the detention, to the extent that they were aware of it.