Because his most powerful weapon is controlling the public discourse. If he goes entirely silent then the government will step in to fill the void: "His gir

Because his most powerful weapon is controlling the public discourse. If he goes entirely silent then the government will step in to fill the void: "His girlfriend's a stripper, he's a hacker terrorist, his neighbors say he's weird, he might be a soviet spy, he did it all for the attention, he's not an American." If he speaks out on a daily basis the news media will eventually grow tired of the story and move on leaving him to be a 3rd page story when he's arrested. His best option right now is to stay in front of the news for as long as possible until some solution is worked out. In the meantime staying positive with the American people will do more good for his eventual trial.