How many Iowans really decide this contest, anyway?
Nathaniel noted earlier in the evening that Democrats moved their Iowa nominating contest to later in the primary season, in part because Iowa is demographically unrepresentative. And we've also noted that tonight's extremely cold weather may suppress turnout. But what is the normal turnout, anyway? In 2020, about 176,000 Iowans showed up for the competitive Democratic caucuses. That was a slight improvement over the 2016 numbers, the last year Republicans had a competitive primary, when about 15.7 percent of the Iowa voting population turned out for caucuses. That's really a small percentage of eligible voters in a small state that doesn't always vote the way the rest of the country does. But as others have noted, the first contest can help set the expectations as we progress through the rest of the primary calendar.
—Monica Potts, 538