Wilford Brimley plays the chairman of the Democratic National Committee. In real life, Brimley is a Republican and campaigned for John McCain for President in 2008.
At the Russell P. Kramer Presidential Library in Ohio, there is a life size cutout of President Kramer in a U.S. Naval officer's uniform. Jack Lemmon really served in the U.S. Navy during World War II
When presidents Kramer and Douglas walk into the rental-car office in West Virginia, there is a Wachovia bank branch across the street behind them. Wachovia does not have branches in West Virginia.
In the shooting scene in the car, President Douglas is given a summons from his ex wife. He reads it and throws it on the floorboard of the car. When he leaves the car, he leaves the summons, which would have identified him as being in the murder car.
Matt Douglas: [Presidents Douglas and Kramer lead a White House tour as fast as possible in order to get to the Oval Office in time]
Okay, this is the Green Room...