We are going to win the Iowa caucus because we have the strongest grassroots organization

"We are the candidate who has a base," Sanders Iowa State Director Misty Rebik said. "Having a base is the most important thing for caucus night, because this isn't a primary, this isn't a vote. People can't just show up whenever and do it, right? You need an enthusiastic, excited, trained, disciplined, focused group of people who show up for you on caucus night. And that all starts with the committed base."