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The framers ' theory of U.S. citizenship and of constitutional delegation assumed plenary congressional power to enforce the rights of U.S. citizens and to supplant the states ' authority over the rights of U.S. citizens ; they rejected any intention of displacing the states completely in performing the essential governmental function of enforcing citizens ' rights . For this reason hemoglobin molecules completely fill with oxygen molecules . Indeed , there are already classes of products completely depending on it . Edwards notes that the SDI system would need to be fully automated , taking people completely out of the loop . To this day he still cannot close his fingers completely because of the injury .