From student superstar, to controversial first lady, to historic candidate for president, Hillary Clinton has become the most written about woman in American politics. Unfinished Business: The Essential Hillary Clinton takes a look at the highs, the lows, and the inside stories behind the moments that have defined the democratic presidential nominee. CNN’s Brown sits down with both Hillary Clinton and daughter Chelsea Clinton, to look at how she became a political force in her own right — as Senator, and later, Secretary of State.