Other mistake: This error occurs during the scene in which the President and Lewis Rothschild are riding in the limo, just after the President has broken a date with Syndney. The background scenery, visible through the windows of the car, is noticeably in slow motion, even though the car (and the people inside it) are moving at regular speed.
Factual error: In the scenes of the dinner honoring the President of France, they descend the stairs into the entrance hall and cross towards the State Dining Room. The remaining scenes of the dinner take place in the much larger East Room, completely on the other side of the White House, recognizable from the larger chandeliers and greater size of the room.
Factual error: When Sydney arrives at the Christmas Party, President Shepherd and A.J. MacInerney ask where she's been. She says she was stuck at Dupont Circle and they ask why she was on the Hill. But to get from Capitol Hill to the White House, one would not drive anywhere near Dupont Circle.
Continuity mistake: In the first scene where President Andrew Shepherd encounters his daughter practising the trombone in her room, he talks to her about a parent-teacher conference and hands her a book. In the shot where he hands her the book, it is right side up for the girl to open easily. In the shot where she receives the book, she has to turn it around to open it.
Continuity mistake: In the meeting room with the White House Chief of Staff, Sydney is giving a self-righteous speech about the President being president of Fantasyland. When the President walks into view, she immediately stands up from her chair. Then in the next shot, she immediately stands up again.
Continuity mistake: The morning after the President and Sydney have spent the night together for the first time, while Sydney is getting dressed to leave, the collar of her turtleneck sits flat in the front (around her neck), but in the next shot the same collar is dog-eared in front, then goes back to sitting flat.