U.S. President Barack Obama talks with volunteers on a mobile phone in his campaign field office in Orlando, Florida, October 28, 2012.
Audience members watch a biographical video about Republican presidential nominee Mitt Romney at a campaign rally in Pensacola, Florida, October 27, 2012.
Republican presidential candidate and former Massachusetts Gov. Mitt Romney holds a football on the tarmac of Akron-Canton Regional Airport in Akron, Ohio, Oct. 26, 2012.
An Obama supporter chants "four more years" as U.S. President Barack Obama speaks during a campaign rally in Tampa, Florida, October 25, 2012.