I believe that the power to declare war is most important in limiting the powers of the national government in regard to the rights of its citizens, but that it does not require Congress to give its approval before the president uses force abroad.
It urges policy makers and the Supreme Court to make the mistake of curing what could prove to be an isolated problem by disarming the government of its principal weapon to stop future terrorist attacks.
The national government has certain kinds of compelling interests that conflict with the right of the press to keep their sources confidential, like national defense and security.