A scene takes place inside the Vice President's airliner, which has the call-sign Air Force Two. This aircraft at time of filming was a Boeing C-32 (a modified Boeing 757). The set used for the scene is The West Wing's set for Air Force One, a modified wide-body Boeing 747, and the stairs to the upper-deck briefly appear. The C-32 is a narrow-body airliner without an upper-deck.
As the Santos campaign plane begins its descent into Sacramento, the pilot seems to say "Sacramento's Franklin (field)". While there is a Franklin Field south of Sacramento it is a small General Aviation field with no services and insufficient Runway Length/surface to handle a jet airliner.