Most of the cast met with their real-life counterparts prior to filming. The real Katherine Harris refused to meet with Laura Dern or anybody else associated with the production, despite repeated pleas from Dern, writer Danny Strong and director Jay Roach.
Ben Ginsberg states that Bill Daley's father "stole it for JFK," referring to the belief that Chicago mayor Richard Daley rigged the vote in Illinois in 1960. Kennedy would have still won the electoral college without Illinois.
In the first scene, where James Baker is drinking Dr. Pepper,
the can he is drinking from was not issued in 2000. However, later on in the movie, this error was corrected and he is drinking out of the older version of the can.
Michael Whouley: Now it's time to prove to Al Gore who the real Ron fucking Klain really is. It's time to show Al Gore that Ron Klain is a fucking brawler and he's not going to back down from this particular fucking fight.