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

Sens. Elizabeth WarrenElizabeth Ann WarrenYoung insurgents aren't rushing to Kennedy's side in Markey fight Biden's debate performance renews questions of health On The Money: Democratic candidates lay into Trump on trade | China exempts US soybeans, pork from tariff hikes | Congress set to ignore Trump's wall request in stopgap measure MORE (D-Mass.) and Kamala HarrisKamala Devi HarrisHarris keeps up 'little dude' attack on Trump after debate The crosshairs of extremism  On The Money: Democratic candidates lay into Trump on trade | China exempts US soybeans, pork from tariff hikes | Congress set to ignore Trump's wall request in stopgap measure MORE (D-Calif.) have surged into a virtual tie with former Vice President Joe BidenJoe BidenEric Holder: Democrats 'have to understand' that 'borders mean something' Young insurgents aren't rushing to Kennedy's side in Markey fight Biden says he'll release medical records before primaries 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 SandersYoung insurgents aren't rushing to Kennedy's side in Markey fight Biden's debate performance renews questions of health Saagar Enjeti rips Harris's 'empty promises' MORE (I-Vt.) is just off the podium at 12 percent, closely trailed by South Bend, Ind., Mayor Pete ButtigiegPeter (Pete) Paul ButtigiegOn The Money: Democratic candidates lay into Trump on trade | China exempts US soybeans, pork from tariff hikes | Congress set to ignore Trump's wall request in stopgap measure Saagar Enjeti rips Harris's 'empty promises' Overnight Defense: Afghanistan tops foreign policy issues at Dem debate | Erdogan says he'll discuss missile sale with Trump | US again challenges Beijing's claim to South China Sea MORE at 10 percent. Sen. Amy KlobucharAmy Jean KlobucharOn The Money: Democratic candidates lay into Trump on trade | China exempts US soybeans, pork from tariff hikes | Congress set to ignore Trump's wall request in stopgap measure Overnight Energy: Harris goes after DOJ antitrust probe of automakers over emissions | Trump on energy-efficient light bulbs: 'I always look orange' | Climate change only briefly discussed in third presidential debate CNN, NY Times to host next Democratic debate in October MORE (D-Minn.) clocks in at 4 percent, and Sen. Cory BookerCory Anthony BookerCastro attack shines spotlight on Biden's age CNN, NY Times to host next Democratic debate in October Poll: College students say Warren won third Democratic debate 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.

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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.