HARLOW: Presidential hopeful Elizabeth Warren is surging in Iowa. A new CNN-"Des Moines Register" poll shows that she and the Vice -- former Vice President Joe Biden are really within the margin of error. Let's talk about this, dig into the numbers, Asma Khalid; political correspondent for "NPR", and our senior political writer Harry Enten now with me. Good morning to you both. Harry, I mean, looking at this, what strikes me that is big, there's no clear leader, Joe Biden, Elizabeth Warren are within the margin of error here, and when you look at the favorability ratings, she has a lot to be happy about.</s>HARRY ENTEN, CNN SENIOR POLITICAL WRITER & ANALYST: Yes, I mean, I think look at the trend line in the polls, right? She's jumped from March when she was in the single digits up to 15 in June, and then up to 22 percent, now Joe Biden going the other direction. Bernie Sanders really falling off of it. But I think what you pointed out is key, right? Take a look at the internals of this poll --</s>HARLOW: Yes --</s>ENTEN: If you look at those very favorable ratings, she's up to 44, Biden is back in 20s. If you look at the actively considering voting for, even if you're not -- she's not your first choice, she's way up there.</s>HARLOW: Right --</s>ENTEN: Overall, it's a very good poll for her. I guess my big question, honestly, is why isn't she doing better despite the fact that her very favorable ratings are so high?</s>HARLOW: Even better --</s>ENTEN: Even better --</s>HARLOW: OK, that's interesting --</s>ENTEN: That's my thing.</s>HARLOW: Asma, one number that also struck me from this poll is 48 percent of very liberal, likely caucus goers, and we know because they're the rules here, they have to go, they have to get up and go, say they prefer Warren versus 20 percent who prefer Bernie Sanders. If you are Bernie Sanders -- END
Elizabeth Warren Surges in New Polls in Iowa