The primary twist in All the President's Men is not a surprise ending—as the audience knows Nixon will resign—but rather the escalating scale of the paranoia and danger. The pivotal turn occurs when Deep Throat finally drops his cryptic demeanor in a late-night garage meeting, explicitly warning Woodward that their lives are in danger and that the conspiracy involves the entire U.S. intelligence community. This shifts the film from a journalistic procedural into a genuine thriller, culminating in the famous, paranoid scene where Woodward goes to Bernstein's apartment, turns up a classical record to deafening levels to mask their conversation from hidden microphones, and types out Deep Throat's terrifying revelations.
The structural twist of the film lies in its ending. Rather than depicting the cathartic resignation of Richard Nixon, the film ends abruptly in January 1973 with Nixon taking the oath of office for his second term. The camera pans away from the inauguration on television to focus on Woodward and Bernstein, heads down, fiercely typing. The screen then cuts to an extreme close-up of a teletype machine punching out a rapid succession of real-world headlines, documenting the subsequent indictments, the discovery of the White House tapes, and finally, Nixon's resignation. This brilliant stylistic choice emphasizes that the journalists' work was the catalyst, leaving the audience to supply the historical triumph themselves.