A series of four instant eBooks on the 2012 presidential election, POLITICO’s Playbook 2012 provides an unprecedented real-time account of the race for the White House. The third edition, Obama’s Last Stand, follows the reelection campaign of President Barack Obama as it struggles to find the winning formula in a political landscape that has changed dramatically since his history-making victory in 2008.   Though battered and bruised after nearly four years in office, Barack Obama remains the most competitive player on the field in American politics today. In Obama’s Last Stand, POLITICO White House correspondent Glenn Thrush chronicles the efforts of the president and his team to secure a second term in the face of a determined opposition, unfavorable economic headwinds, and a series of missteps by his own team.