BOLDUAN: Fresh off the presses, a new poll of Iowa caucus goers shows some very interesting movement in the 2020 Democratic field. Joe Biden is holding steady with 28 percent support among Democrats there in this new Monmouth University poll. But look at Elizabeth Warren making some big gains from the last time they took this poll, now 19 percent support, compare that to where she stood in April the last time they took this measure at 7 percent. And where she goes up, someone needed to go down, and that is Bernie Sanders, down to 9 percent in Iowa now. CNN's Jeff Zeleny joins me now from his home away from home, Des Moines, Iowa. See, you never have -- you always have such a big smile when you're in Iowa. I'm just going to say that for everyone at home. What's the big message that Iowa caucus goers are sending, Jeff, with these new numbers?</s>JEFF ZELENY, CNN SENIOR WASHINGTON CORRESPONDENT: Well, Kate, even on a rainy morning here at the Iowa State Fair, I can tell you that Joe Biden is remaining consistent in those polls, as you said. But the big take-away from this is that Bernie Sanders really has fallen here in this new Monmouth University Iowa poll and, of course, Elizabeth Warren has climbed. And that tracks largely with what we are seeing on the ground over the last several weeks and even months here, of course, the function of the debates. But one thing that also is clear from this is that Joe Biden, of course, is leading this, but the question hanging over this entire primary campaign is, is he the placeholder in the race or is he the frontrunner in the race? Talking to voters here this morning, you get a variety of answers. They like how he's performed in the second debate more than the first. But people are still keeping an open mind. That's one of the reasons Joe Biden will be here talking this afternoon at the famous Des Moines Register Soap Box. It's where politicians stand on an actual soap box and give their speech, their message. Governor Steve Bullock from Montana also will be speaking here.
New Iowa Poll Shows Joe Biden Leads, Sen. Elizabeth Warren (D-MA) Surges, Sen. Bernie Sanders (I-VT) Sinks.