Four More Years: Obama 2012: OFA2012_041

September 2, 2012 - Boulder, CO: Supporters listen as President Barack Obama speaks at a campaign event at the University of Colorado Boulder. (Scout Tufankjian for Obama for America/Polaris)

September 2, 2012 - Boulder, CO: Supporters listen as President Barack Obama speaks at a campaign event at the University of Colorado Boulder. (Scout Tufankjian for Obama for America/Polaris)