Who plays the mentally unbalanced politician that Christopher Walken's character must stop in "The Dead Zone"?

The mentally unbalanced politician that Christopher Walken's character (Johnny Smith) must stop in the 1983 American science-fiction thriller film "The Dead Zone" is Martin Sheen. Sheen plays Gregory Ammas Stillson (Gregory Stillson), a politician and future United States President whose rise to power will eventually bring on Armageddon. He is the main antagonist of Johnny Smith.

In the film, following the publication of photographs showing Stillson using a child as a shield from Smith's attack, Stillson commits suicide. Smith is able to prevent the apocalyptic vision he had about Stillson. He had his vision when he had shook hands with Stillson.

Ramón Gerardo Antonio Estévez was born in August 1940. He is an American who was raised in the US to immigrant parents. He is best known by his stage name Martin Sheen. He is an actor who is known for his famous roles in the films "Badlands" (1973) and "Apocalypse Now" (1979). Additionally, he is known for his role in the TV series "The West Wing" from 1999 to 2006.

In the movies, Sheen has worked with a wide variety of film directors, such as Richard Attenborough, Francis Ford Coppola, Terrence Malick, Mike Nichols, Martin Scorsese, Steven Spielberg and Oliver Stone. He has had a star on the Hollywood Walk of Fame since 1989. In TV, he has won both a Golden Globe and two Screen Actors Guild awards for playing the lead role of President Bartlet in "The West Wing" and an Emmy for guest acting in the sitcom "Murphy Brown".