Glenn Greenwald is a constitutional law attorney and writes for the Guardian. He is the author of four books, most recently "With Liberty and Justice for Some: How the Law Is Used to Destroy Equality and Protect the Powerful."
The 29-year-old source behind the biggest intelligence leak in the NSA's history explains his motives, his uncertain future and why he never intended on hiding in the shadows.
Greenwald: "no living political writer who has more radically changed how more people think in more parts of the world about political issues than he."
The delirium of liberals this morning is understandable. By all rights, they should expect to be a more powerful force in Washington. But what are they going to get from it?