AdvertisementObama's Legacy: His Army Of Campaign Volunteers Continues To ServeJanuary 05, 2017Scott HorsleyfacebookEmailVolunteers in Des Moines make calls at the campaign headquarters of then-Democratic presidential hopeful Sen. Barack Obama on Dec. 5, 2007 ahead of the Iowa caucus. Obama has called those "fired-up" campaign workers from his 2008 campaign, one of his proudest legacies. (Getty Images)