The character Vinick on 'The West Wing' was portrayed by actor Alan ALDA. ALDA is a four-letter word that can be used to solve the crossword puzzle. ALDA is an American actor, director, screenwriter, and author who has been active in the entertainment industry since the 1950s. He is best known for his roles in films such as M*A*S*H, The Seduction of Joe Tynan, and Crimes and Misdemeanors, as well as his role as Senator Arnold Vinick on the television series The West Wing.