https://en.wikipedia.org/wiki/The_Parallax_View
The Parallax View is a 1974 American political thriller film starring Warren Beatty, with Hume Cronyn, William Daniels and Paula Prentiss in support. Produced and directed by Alan J. Pakula, its screenplay is by David Giler and Lorenzo Semple Jr., based on the 1970 novel by Loren Singer.[2] The story concerns a reporter's investigation into a secretive organization, the Parallax Corporation, whose business is political assassination.
I've wondered sometimes if this is the movie Q sort of references and is there a "P" organization.