Colorado and Minnesota both choose their delegates in caucuses. The caucus system, which generally brings out only the most motivated activists, presumably makes them friendlier to a candidate such as Sanders, who has inspired a movement of liberal Democrats. But caucuses require a bigger investment of time, making it harder to draw out less committed voters, which could give Sanders a disadvantage. One line of thinking within the campaign, for instance, is that he would have won Nevada had it been a primary instead of a caucus. And in fact, turnout was not down in New Hampshire, the only primary to be held so far.