MacKenzie McHale, played by actress Emily Mortimer, spends a good portion of the episode trying to correct a Wikipedia page which states that she had attended the University of Oxford instead of Cambridge University. Mortimer actually attended Oxford.
Each segment has Sorkin explaining what he was trying to say and accomplish in: "Inside the Episode".
At the end of "Election Night part II", that segment had Sorkin defending Reese as a less than likable boss,
but never guilty of anything "immoral." This is actually not true, and was a mistake by Aaron Sorkin, as Reese was immorally guilty of tapping his employees telephones.
The abbreviation for Mississippi is actually MS.
Jane Fonda (Leona Lansing) & Sam Waterston (Charlie Skinner) also worked together on Grace and Frankie (2015) as Grace Hanson & Sol Bergstein respectively.