Article Photos: Romney campaign trails in crucial ground game



Audience members show their suppport for Republican presidential candidate and former Massachusetts Gov. Mitt Romney as he campaigns in Las Vegas, Friday, Sept. 21, 2012. (AP Photo/Charles Dharapak)

Audience members show their suppport for Republican presidential candidate and former Massachusetts Gov. Mitt Romney as he campaigns in Las Vegas, Friday, Sept. 21, 2012. (AP Photo/Charles Dharapak)