President Barack Obama walks from the White House to Marine One, Wednesday, Oct. 24, 2012, in Washington, enroute to Andrews Air Force Base, Md., then onto campaign events in Iowa, Colo

 

              President Barack Obama walks from the White House to Marine One, Wednesday, Oct. 24, 2012, in Washington, enroute to Andrews Air Force Base, Md., then onto campaign events in Iowa, Colo
President Barack Obama walks from the White House to Marine One, Wednesday, Oct. 24, 2012, in Washington, enroute to Andrews Air Force Base, Md., then onto campaign events in Iowa, Colorado, California, and Nevada. (AP Photo/Carolyn Kaster)