Warren, Harris surge into tie with Biden in new Iowa poll

Sens. Elizabeth WarrenElizabeth Ann WarrenJuan Williams: Honesty, homophobia and Mayor Pete Trump DACA fight hits Supreme Court Democrats on edge as Iowa points to chaotic race MORE (D-Mass.) and Kamala HarrisKamala Devi HarrisJuan Williams: Honesty, homophobia and Mayor Pete Democrats debate how to defeat Trump: fight or heal Women who inspired 'Hidden Figures' film will be honored with congressional gold medals MORE (D-Calif.) have surged into a virtual tie with former Vice President Joe BidenJoe BidenImpeachment week: Trump probe hits crucial point Trump DACA fight hits Supreme Court Juan Williams: Honesty, homophobia and Mayor Pete MORE in Iowa after last week’s debates, according to a new survey conducted for a Democratic group. 

The poll, conducted by Democratic pollster David Binder for the group Focus on Rural America, shows Warren leading the field with 20 percent of the vote, a statistical tie with Harris at 18 percent and Biden at 17 percent.

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Sen. Bernie SandersBernie SandersJuan Williams: Honesty, homophobia and Mayor Pete Democrats on edge as Iowa points to chaotic race Democrats debate how to defeat Trump: fight or heal MORE (I-Vt.) is just off the podium at 12 percent, closely trailed by South Bend, Ind., Mayor Pete ButtigiegPeter (Pete) Paul ButtigiegJuan Williams: Honesty, homophobia and Mayor Pete Democrats on edge as Iowa points to chaotic race Democrats debate how to defeat Trump: fight or heal MORE at 10 percent. Sen. Amy KlobucharAmy Jean KlobucharDemocrats debate how to defeat Trump: fight or heal Republicans, Democrats brace for first public testimony in impeachment inquiry Klobuchar: A woman with Buttigieg's experience would not be on presidential debate stage MORE (D-Minn.) clocks in at 4 percent, and Sen. Cory BookerCory Anthony BookerThe Hill's Campaign Report: Bloomberg looks to upend Democratic race Poll: Biden support hits record low of 26 percent The Hill's 12:30 Report: Trump demands Bidens testify MORE (D-N.J.) scores 2 percent. Ten other candidates each notch 1 percent support in the Hawkeye State.

The poll shows Warren and Harris both doubling their support following strong performances in last week’s debate, while Biden and Sanders have slipped. In the group’s March poll, Biden led the field with 25 percent support, followed by Sanders at 17 percent.  

Klobuchar, Booker and former Rep. Beto O’Rourke (D-Texas) all saw their poll numbers slip. O’Rourke’s support slipped from 6 percent in the March poll to just 1 percent in the July survey, conducted entirely after the debates.

The debates certainly helped Harris and Warren: Voters who watched some or all of the two-night coverage said they were most likely to back one of the two senators, both of whom stood out onstage against their rivals.  

Harris has been steadily rising since she announced she would run in January.

Today, 82 percent of Iowa Democrats surveyed say they have a positive opinion about the California senator, up from 54 percent in a December poll and 73 percent in March. Warren is the most popular Democrat in the field, with 88 percent of respondents saying they have a positive opinion about the Massachusetts Democrat. 

Buttigieg’s image has also improved markedly, growing from a 44 percent positive image to an 80 percent positive image from March to July. 

On the other hand, Biden and Sanders have both seen opinions about them slide.

About three-quarters of Iowa Democrats polled, 74 percent, see Biden positively, down from 90 percent in December and 88 percent in March; Sanders’s positive image slipped from 83 percent in March to 73 percent in July.

Fewer than 1 in 3 Iowa Democrats see eight of the lesser-known contenders in a positive light: Businessman Andrew YangAndrew YangIntercollegiate athletics just got a two-minute warning AI and automation will disrupt our world — but only Andrew Yang is warning about it The Hill's Campaign Report: Bloomberg looks to upend Democratic race MORE, Reps. Eric SwalwellEric Michael SwalwellImpeachment week: Trump probe hits crucial point Republicans, Democrats brace for first public testimony in impeachment inquiry Sunday shows — New impeachment phase dominates MORE (D-Calif.), Tim RyanTimothy (Tim) RyanStrategists say Warren 'Medicare for All' plan could appeal to centrists Trump mocks O'Rourke after Democrat drops out of race The Memo: What the leading 2020 Dems need to do MORE (D-Ohio) and Seth MoultonSeth MoultonIt's time for Congress to establish a national mental health crisis number Bill introduced to give special immigrant visas to Kurds who helped US in Syria Tim Ryan drops out of 2020 presidential race MORE (D-Mass.), Montana Gov. Steve BullockSteve BullockObama's former chief economist advising Buttigieg The Hill's 12:30 Report: Trump says Dems shouldn't hold public hearings The Hill's Campaign Report: Bloomberg looks to upend Democratic race MORE (D), Sen. Michael BennetMichael Farrand BennetDemocrats debate how to defeat Trump: fight or heal Overnight Energy: EPA watchdog slams agency chief after deputy fails to cooperate in probe | Justices wrestle with reach of Clean Water Act | Bipartisan Senate climate caucus grows Bipartisan Senate climate caucus grows by six members MORE (D-Colo.), author Marianne WilliamsonMarianne WilliamsonYang seeks donations for 2020 rival Marianne Williamson: 'She has much more to say' Pushing results, not polarization, in New Hampshire Williamson focuses on reparations in first ad of presidential campaign MORE and Wayne MessamWayne Martin MessamThe Memo: What the leading 2020 Dems need to do Wayne Messam raised this quarter for presidential run The Hill's 12:30 Report: Hunter Biden speaks out amid Ukraine controversy MORE, the mayor of Miramar, Fla.

The survey of 600 likely Iowa Democratic caucusgoers was conducted June 29-July 1, over both landline and cellphones, carrying a margin of error of 4 percentage points.