Please answer the following question: Build a movie plot around this: Who volunteers to help Dave run for city council? Former First Lady Ellen Mitchell.
A:
Dave Kovic (Kevin Kline) runs a temporary employment agency in Georgetown, Washington, D.C.. As a sideline, he makes appearances impersonating President William Harrison "Bill" Mitchell, whom he has an uncanny resemblance to (and who is also played by Kline). One Mitchell's devious Chief of Staff, Bob Alexander (Frank Langella), hires Dave to make an exit at an appearance of President Mitchell, to cover up Mitchell's extramarital affair with White House staffer Randi (Laura Linney).When the real President Mitchell suffers a stroke while having sex with Randi, he is left in a coma. Alexander sees an opportunity, and along with Communications Director Alan Reed (Kevin Dunn), he arranges for the President's comatose state to be kept secret. They then con Dave into impersonating the president on an ongoing basis by telling him that the country would suffer if the truth was revealed or if Vice President Gary Nance (Ben Kingsley), who they claim is mentally ill, took office. Apart from them, only his Secret Service bodyguard, Duane Stevenson (Ving Rhames) and the medical staff tending to the real President Mitchell in the White House basement (and who are being paid hush money by Reed), know the truth. Neither Mitchell's mistress Randi nor First Lady Ellen Mitchell (Sigourney Weaver) is informed of the switch.Alexander's true agenda is to exercise the power of the presidency through Dave as a proxy in the short-term, while in the long term framing Nance for illegal activities, allowing Alexander to succeed Nance as Vice President, and ultimately become President himself. However, Dave gradually sets his own course of action, which revives Mitchell's popularity with the public and mystifies both the Washington media (several well-known personalities make cameo appearances as themselves) and the First Lady, whose public support of her husband has been a cover for bitter marital strife in their private life. Michell calls on his friend Murray, an accountant from Baltimore, to rework the national budget in order to...