Head of State (2003) on Netflix

Mays Gilliam, a Washington D.C. neighborhood Alderman, is about to be red-lined out of his job. But after the untimely death of the party frontrunner, Gilliam is plucked from obscurity, and thrust into the limelight as his party's nominee--for President of the United States. The players in Gilliam's life include: Mitch Gilliam, his unsophisticated older brother who becomes his running mate; Kim, his ex-girlfriend who had once dumped him, but who now has a sudden change of heart as she sees a chance at becoming First Lady; Martin Geller, his campaign manager; Lisa Clark, the woman who truly believes in Gilliam; and Debra Lassiter, the woman who doesn't have faith in his candidacy, and is serving as his reluctant advisor.