This photo provided by Courtney Grimm shows the shattered glass outside of President Barack Obama's Denver campaign office on Friday, Oct. 12, 2012. (AP Photo/Courtney Grimm)

Photo by: Uncredited

This photo provided by Courtney Grimm shows the shattered glass outside of President Barack Obama's Denver campaign office on Friday, Oct. 12, 2012. (AP Photo/Courtney Grimm)