According to the myth of “homeland security,” no matter how much military strength we have or control we exert, there is always “a rising tide of tumult” somewhere that threatens our national security. At every moment, somewhere in the world, we have something crucial to lose. The name of the threat can change with surprising ease. But the peril must always be there. It’s essential to the story. And that story, in turn, is now essential to every presidential contest.




