Trivia: Janel Moloney (Donna Moss) was originally intended to be a rarely seen or heard background player (similar to Tobey and Sam's assistants). But very quickly, her banter and rapport with Josh became a fan favorite and she was promptly made a regular cast member and given much more screen time. When Mandy was dropped from the show after season one, Moira Kelly's name and image were dropped from the opening credits, replaced by Janel. As they say, "There are no small parts. Only small actors."
Trivia: The election originally ended with Arnold Vinick as the victor. But in light of John Spencer's death (and by necessity, Leo's), the writers felt it would be too emotionally taxing on the audience for Santos to lose both his running mate and the election.