'Argo,' 'Lincoln,' and 'Zero Dark Thirty,' three films honored with Best Picture Oscar nominations, lionize their Washington-anchored protagonists as crafty, competent, and virtually incorruptible.

'Argo,' 'Lincoln,' and 'Zero Dark Thirty,' three films honored with Best Picture Oscar nominations, lionize their Washington-anchored protagonists as crafty, competent, and virtually incorruptible.