President Obama waves to supporters upon his arrival in Green Bay, Wis., on Thursday, Nov. 1, 2012, for a quick campaign stop before heading to Las Vegas. (AP Photo/Tom Lynn)

Photo by: Tom Lynn

President Obama waves to supporters upon his arrival in Green Bay, Wis., on Thursday, Nov. 1, 2012, for a quick campaign stop before heading to Las Vegas. (AP Photo/Tom Lynn)