FILE - In this Oct. 24, 2012, file photo, President Barack Obama speaks during a campaign rally in Las Vegas. No region in America has seen more presidential campaign commercials. Last

 

              FILE - In this Oct. 24, 2012, file photo, President Barack Obama speaks during a campaign rally in Las Vegas. No region in America has seen more presidential campaign commercials. Last
FILE - In this Oct. 24, 2012, file photo, President Barack Obama speaks during a campaign rally in Las Vegas. No region in America has seen more presidential campaign commercials. Last week alone, Mitt Romney's campaign and its allies spent $3.6 million on Nevada commercials, while Obama and his supporters spent $2.7 million. (AP Photo/Julie Jacobson, File)