October 3, 2012
Charles Dharapak photo

Republican presidential candidate, former Massachusetts Gov. Mitt Romney poses for a photo with workers as he makes an unscheduled stop at a Chipotle restaurant in Denver, Tuesday, Oct. 2, 2012.

Charles Dharapak photo

Republican presidential candidate, former Massachusetts Gov. Mitt Romney takes a photo with workers as he makes an unscheduled stop at a Chipotle restaurant in Denver, Tuesday, Oct. 2, 2012.

Charles Dharapak photo

Republican presidential candidate, former Massachusetts Gov. Mitt Romney, accompanied by Sen. Rob Portman, R-Ohio, shakes hands with a worker as he makes an unscheduled stop at a Chipotle restaurant in Denver, Tuesday, Oct. 2, 2012.