Article Photos: Obama, GOP scramble for early votes in Colorado



President Barack Obama greets supporters on the tarmac upon his arrival at Denver International Airport in Denver, Thursday, Nov. 1, 2012. (AP Photo/Pablo Martinez Monsivais)

President Barack Obama greets supporters on the tarmac upon his arrival at Denver International Airport in Denver, Thursday, Nov. 1, 2012. (AP Photo/Pablo Martinez Monsivais)