President Obama walks from the White House to Marine One on Oct. 24, 2012, en route to Andrews Air Force Base, Md., then onto campaign events in Iowa, Colorado, California and Nevada. (Associated Press)

Photo by: Carolyn Kaster

President Obama walks from the White House to Marine One on Oct. 24, 2012, en route to Andrews Air Force Base, Md., then onto campaign events in Iowa, Colorado, California and Nevada. (Associated Press)