Republican presidential candidate, former Massachusetts Gov. Mitt Romney speaks at a Colorado Conservative Political Action Committee (CPAC) meeting in Denver, Thursday, Oct. 4, 2012. (AP Photo/Charles Dharapak)

Associated Press
Republican presidential candidate, former Massachusetts Gov. Mitt Romney speaks at a Colorado Conservative Political Action Committee (CPAC) meeting in Denver, Thursday, Oct. 4, 2012. (AP Photo/Charles Dharapak)
Republican presidential candidate, former Massachusetts Gov. Mitt Romney speaks at a Colorado Conservative Political Action Committee (CPAC) meeting in Denver, Thursday, Oct. 4, 2012. (AP Photo/Charles Dharapak)