She was once as famous as Jackie O—and then she tried to take down a President. Martha Mitchell was the unlikeliest of whistleblowers: a Republican wife who was discredited by Nixon to keep her quiet. Until now.

"The Most Dangerous Man in America" is the story of what happens when a former Pentagon insider, armed only with his conscience, steadfast determination, and a file cabinet full of classified documents, decides to challenge an "Imperial" Presidency-answerable to neither Congress, the press, nor the people-in order to help end the Vietnam War.

Many times during his presidency, Lyndon B. Johnson said that ultimate victory in the Vietnam War depended upon the U.S. military winning the "hearts and minds" of the Vietnamese people. Filmmaker Peter Davis uses Johnson's phrase in an ironic context in this anti-war documentary, filmed and released while the Vietnam War was still under way, juxtaposing interviews with military figures like U.S. Army Chief of Staff William C. Westmoreland with shocking scenes of violence and brutality.