Winter Kills (1979) is, while not as good as Pakula's political thrillers, pretty watchable, even though most of its satire comes off as goofy. Features a chilling assassination sequence, set in Philadelphia. Plus, look at that crazy cast: Jeff Bridges, John Huston, Anthony Perkins, Eli Wallach, Sterling Hayden, Toshiro Mifune...
We've mentioned Little Murders in the past. Divisive movie; I love it.