Movie with Frank Sinatra and deck of cards?

The movie you're referring to is likely "The Manchurian Candidate" (1962). In this political thriller, Frank Sinatra plays Major Bennett Marco, who uncovers a conspiracy involving brainwashing and assassination. A deck of cards is used as a motif throughout the film, symbolizing manipulation and the hidden agendas of the characters. The film is notable for its suspenseful plot and social commentary on Cold War-era America.