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

We’re still a ways away from resolving second place, but ABC News is able to project at this point that Ramaswamy will finish in fourth place. A disappointing finish for the candidate who absolutely poured effort into the state, holding as many as nine events per day in the home stretch.

Trump, as we know, has a massive advantage among voters without a college education. According to preliminary entrance polling those voters make up about half of the electorate tonight, and Trump had 65 percent of those voters in his corner. But among voters with a college degree, who make up the other half of voters, Trump is still winning, albeit by a much narrower margin, with 35 percent to Haley’s 29 percent and DeSantis’s 25 percent. Any path for a viable challenge to Trump in a GOP primary would require serious strength among college-educated voters, and neither DeSantis nor Haley are showing much of that tonight. The New York Times had a good read on Trump’s resurgence among college-educated Republicans a few days ago.

My general rule of thumb is not to report results until at least 10 percent of the expected vote is reporting, but I’ll make an exception here since people are already sharing them on social media. With 2 percent of the expected vote reporting, Trump has 55 percent of the vote so far, DeSantis has 19 percent, Haley has 19 percent and Ramaswamy has 7 percent. But this is based on a grand total of about 3,000 votes, so there is PLENTY of time for these numbers to shift.

Earlier tonight, Ramaswamy dropped out of the race following his fourth place Iowa finish and endorsed Trump. We've already noted how Ramaswamy was all-in in Iowa, traveling through the entire state twice. Ramaswamy had a brief moment in the sun earlier in the race, but that investment didn't really pay off. He urged his supporters to support Trump, but polls show he's already their number two choice. That could make a difference in New Hampshire, where Haley has been closing in on Trump's lead.

—Monica Potts, 538