No single issue has defined the [Bush] presidency more than fighting terrorism. And no issue has both animated and intimidated Democrats. Into this tricky intersection of terrorism, policy and politics steps [Rand Beers], a lifelong bureaucrat, unassuming and tight- lipped until now. He is an unlikely insurgent. He served on the NSC under Presidents Ronald Reagan, George H.W. Bush, Bill Clinton and the current Bush. The oath of office hangs on the wall by his bed; he tears up when he watches "The West Wing." Yet Beers decided that he wanted out, and he is offering a rare glimpse in.

In a series of interviews, Beers, 60, critiqued Bush's war on terrorism. He is a man in transition, alternately reluctant about and empowered by his criticism of the government. After 35 years of issuing measured statements from inside intelligence circles, he speaks more like a public servant than a public figure. Much of what he knows is classified and cannot be discussed. Nevertheless, Beers will say that the administration is "underestimating the enemy." It has failed to address the root causes of terror, he said. "The difficult, long-term issues both at home and abroad have been avoided, neglected or shortchanged and generally underfunded."

Shortly after that, Beers joined the [John F. Kerry] campaign. He had briefly considered a think tank or an academic job but realized that he "never felt so strongly about something in my life" than he did about changing current U.S. policies. Of the Democratic candidates, Kerry offered the greatest expertise in foreign affairs and security issues, he decided. Like Beers, Kerry had served in Vietnam. As a civil servant, Beers liked Kerry's emphasis on national service.