A heartwarming story of mistaken identity and idealism, director Ivan Reitman ( Ghostbusters ) takes on the political establishment in this fresh, funny comedy. Kevin Kline ( Sophie's Choice , A Fish Called Wanda ) plays Dave Kovic, a sweet man with a big heart running an employment agency. Dave happens to be a dead ringer for the current president of the United States, and he hires himself out as an impersonator for parties and mall openings. When the real president … mehrhas a stroke while in bed with an aide, his ambitious chief of staff (Frank Langella) decides to hold onto the White House by appealing to Dave's sense of patriotism and having him pose as the president. Soon, however, Dave is running the country in a way contrary to what the chief of staff would like, even as he finds himself falling in love with the unsuspecting first lady (Sigourney Weaver). The movie's unbridled optimism is its best asset, and it makes this a pleasant comedy worth seeing. --Robert Lane weniger