Article Photos: 2012 challenge: Corral undecided likely voters



President Barack Obama waves to the crowd as he arrives at a campaign event at the Summerfest Grounds at Henry Maier Festival Park, Saturday, Sept. 22, 2012, in Milwaukee. (AP Photo/Carolyn Kaster)

President Barack Obama waves to the crowd as he arrives at a campaign event at the Summerfest Grounds at Henry Maier Festival Park, Saturday, Sept. 22, 2012, in Milwaukee. (AP Photo/Carolyn Kaster)