May 25 -- Hillary Clinton is doubling down on data. Earlier this month the campaign advertised three dozen analytics, digital, and engineering openings, including one for an e-mail writer. Her campaign is looking to build on the digital engagement strategy devised by the Obama team, customizing the messages e-mailed to the estimated 8.6 million people on its list to make them as personal as possible. Bloomberg's Tim Higgins has more on "Bloomberg Markets."