"There are abundant reasons for rejecting the further expansion of the military's domestic role," says Mackubin T. Owens, a professor of strategy and force planning at the Naval War College. Looking at the issue historically, Owens wrote in an August 2002 essay in the National Review's online edition that "the use of soldiers as a posse [places] them in the uncomfortable position of taking orders from local authorities who had an interest in the disputes that provoked the unrest in the first place." Moreover, Owens said, becoming more involved in domestic policing can be "subtle and subversive ... like a lymphoma or termite infestation." Though we are far from having "tanks rumbling through the streets," he said, the potential long-term effect of an increasing military role in police and law enforcement activities is "a military contemptuous of American society and unresponsive to civilian authorities."
Eberhart says his Northern Command operates scrupulously within the bounds of the law. "We believe the [Posse Comitatus] Act, as amended, provides the authority we need to do our job, and no modification is needed at this time," he told the House Armed Services Committee in March.
Of course, what he knows is that amendments approved by Congress in 1996 for that earlier civilian war, the war on drugs, have already expanded the military's domestic powers so that Washington can act unilaterally in dispatching the military without waiting for a state's request for help. Long before 9/11, Congress authorized the military to assist local law enforcement officials in domestic "drug interdiction" and during terrorist incidents involving weapons of mass destruction. Furthermore, the president, after proclaiming a state of emergency, can authorize additional actions.
Indeed, the military is presently operating under just such an emergency declaration. Eberhart's command has defined three levels of operations, each of which triggers a larger set of authorized activities. The levels are "extraordinary," "emergency" and "temporary." At the "temporary" level, which covers such things as the Olympic Games or the Super Bowl, limited assistance can be provided to law enforcement agencies when a governor requests it, primarily in such areas as logistics, transportation and communications. During "emergencies," the military can provide similar support, mostly in response to specific events such as the attacks on the World Trade Center.