Continuity mistake: When President Mitchell has a staff meeting after he arrives at the White House by helicopter, there is first one, then two empty chairs between him and Alan Reed. (00:04:50)
Continuity mistake: When Dave comes to the President's office where VP Nance is waiting, Duane is holding a pile of newspapers in his right hand. After he explains to Dave whom he is going to see he puts his left thumb under his belt. The camera cuts briefly to Mitchell's former girlfriend, and when we see Duane next he is holding the papers firmly in both hands, which is theoretically possible but looks quite wrong. (01:21:05)
Continuity mistake: At the end of Dave's first entrance as President Mitchell in the hotel lobby, Duane grabs him by the arm and pulls him away from the crowd. When the camera angle changes Dave is surrounded by other security staff but Duane isn't there. (00:14:20)
Continuity mistake: When Dave and the First Lady go to the homeless children's shelter in the President's limo her skirt slips off her knee. Her hands are folded on her left side, as she was trying to lean away from Dave, but when we see the knee from Dave's perspective her hands are folded in the lap. (00:42:50)
Continuity mistake: When Dave starts acting as President, Bob asks him to call his company to tell them that he is going on a trip. When he makes the call and the camera angle changes the glasses he was wearing are lying on the desk. (00:28:30)
Continuity mistake: When Dave gives his first speech on the balcony, the crowd on the lawn changes shape between the back and front shots.
Continuity mistake: While Dave's in the shower talking to the First Lady, his fringe changes style all the time, despite the water not running.
Continuity mistake: On their escape from the White House Dave and the First Lady get stopped by the police. When Dave starts to act as a Mitchell impersonator he puts on his glasses. There's some fluff hanging from the ear piece which is gone in the next shot. (01:08:35)
Continuity mistake: The DC police cars escorting the president after the "second" stroke to Bethesda Naval Hospital would not have happened that way. Once Ambulance and Presidential motorcade reached Maryland lines (Bethesda Naval Hospital in Maryland) outside DC, then the Maryland state police escort or local county police escort would take over. DC police would not cross into Maryland as an escort.
