Rand Paul volunteer rings a cowbell to signify another committed voter for Presidential Candidate Rand Paul at Paul's Des Moines headquarters on...
{"Image ImageDescription": "DES MOINES, IA - FEBRUARY 1:  A Rand Paul volunteer rings a cowbell to signify another committed voter for Presidential Candidate Rand Paul at Paul's Des Moines headquarters on February 1, 2016 in Des Moines, Iowa. Paul volunteers worked the phones in the final hours leading up to the start of the Iowa Caucus. (Photo by Pete Marovich/Getty Images)", "Image Copyright": "2016 Getty Images"}