ADVANCE FOR USE SATURDAY, JULY 21 AND THEREAFTER - This photo taken Dec. 28, 2011, shows Obama 2012 campaign manager Jim Messina at the campaign headquarters in Chicago. Messina, who wa

 

              ADVANCE FOR USE SATURDAY, JULY 21 AND THEREAFTER - This photo taken Dec. 28, 2011, shows Obama 2012 campaign manager Jim Messina at the campaign headquarters in Chicago. Messina, who wa
ADVANCE FOR USE SATURDAY, JULY 21 AND THEREAFTER - This photo taken Dec. 28, 2011, shows Obama 2012 campaign manager Jim Messina at the campaign headquarters in Chicago. Messina, who was David Plouffe's former deputy during the 2008 campaign, has likened the re-election headquarters to a Silicon Valley startup company, demanding metrics and results from his aides. (AP Photo/Charles Rex Arbogast)