One year into the Republican revolution, FRONTLINE presents an investigative biography of House Speaker Newt Gingrich. FRONTLINE correspondent Peter J. Boyer, the New Yorker writer, examines the childhood roots of Gingrich's vaulting ambition, the ev... (more)olution of his philosophy and political methods, his assault on the leadership of both parties in Congress, and how he developed and implemented his battle plans for a GOP takeover of Congress.