A new survey of Iowa Democrats finds four candidates vying for the stop spot in the caucus — Sen. Elizabeth Warren Elizabeth WarrenOvernight Defense: Appeals court revives House lawsuit against military funding for border wall | Dems push for limits on transferring military gear to police | Lawmakers ask for IG probe into Pentagon's use of COVID-19 funds On The Money: Half of states deplete funds for Trump's 0 unemployment expansion | EU appealing ruling in Apple tax case | House Democrats include more aid for airlines in coronavirus package Warren, Khanna request IG investigation into Pentagon's use of coronavirus funds MORE (D-Mass.), South Bend, Ind., Mayor Pete Buttigieg Pete ButtigiegBillionaire who donated to Trump in 2016 donates to Biden The Hill's Morning Report - Sponsored by Facebook - GOP closes ranks to fill SCOTUS vacancy by November Buttigieg stands in as Pence for Harris's debate practice MORE, Sen. Bernie Sanders Bernie SandersSirota reacts to report of harassment, doxing by Harris supporters Republicans not immune to the malady that hobbled Democrats The Hill's Morning Report - Sponsored by Facebook - Republicans lawmakers rebuke Trump on election MORE (I-Vt.) and former Vice President Joe Biden Joe BidenFormer Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick Bloomberg rolls out M ad buy to boost Biden in Florida MORE are bunched at the head of the docket with no clear leader.

The Quinnipiac University poll finds Warren at 20 percent support, followed by Buttigieg at 19 percent, Sanders at 17 percent and Biden at 15 percent. The poll has a 4.5 percentage point margin of error.

Fifty-two percent of likely Democratic voters surveyed said they could still change their minds before the Feb. 3 caucuses.

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Quinnipiac University Polling Analyst Mary Snow indicated that Iowa's caucus is, "A close race with a crowded field of frontrunners."

“While Senator Elizabeth Warren, former Vice President Joe Biden, and Senator Bernie Sanders have held top tier status in national polls for months, South Bend Mayor Pete Buttigieg joins their ranks in the 2020 Iowa caucus. And it's a race that is up for grabs.”

Rounding out the field are Sen. Amy Klobuchar Amy Klobuchar3 reasons why Biden is misreading the politics of court packing Social media platforms put muscle into National Voter Registration Day Battle lines drawn on precedent in Supreme Court fight MORE (D-Minn.) at 5 percent, Sen. Kamala Harris Kamala HarrisTexas Democratic official urges Biden to visit state: 'I thought he had his own plane' The Hill's Campaign Report: Biden on Trump: 'He'll leave' l GOP laywers brush off Trump's election remarks l Obama's endorsements A game theorist's advice to President Trump on filling the Supreme Court seat MORE (D-Calif.) at 4 percent, and businessman Tom Steyer Tom SteyerTV ads favored Biden 2-1 in past month Inslee calls Biden climate plan 'perfect for the moment' OVERNIGHT ENERGY: Trump administration finalizes plan to open up Alaska wildlife refuge to drilling | California finalizes fuel efficiency deal with five automakers, undercutting Trump | Democrats use vulnerable GOP senators to get rare win on environment MORE, tech entrepreneur Andrew Yang Andrew YangBiden's latest small business outreach is just ... awful Doctor who allegedly assaulted Evelyn Yang arrested on federal charges The Hill's Campaign Report: Biden weighs in on police shootings | Who's moderating the debates | Trump trails in post-convention polls MORE, and Rep. Tulsi Gabbard Tulsi GabbardRepublicans call on DOJ to investigate Netflix over 'Cuties' film Hispanic Caucus campaign arm endorses slate of non-Hispanic candidates Gabbard says she 'was not invited to participate in any way' in Democratic convention MORE (D-Hawaii) at 3 percent each.

Self-described “very liberal” Democrats are splitting their vote between Sanders, at 32 percent, and Warren, at 30 percent. Those who describe themselves as “somewhat liberal” are divided between Warren at 29 percent and Buttigieg at 24 percent.

But “moderate and conservative” Democrats make up half of likely caucusgoers, and these are split between Buttigieg at 19 percent and Biden at 18 percent.

Buttigieg tops the field among white voters with college degrees, while Sanders leads among white voters without a college education.

Buttigieg is also the top second choice for voters at 17 percent, followed by Warren at 16 percent, Sanders at 13 percent and Biden at 12 percent.

Among voters whose top candidate is polling at less than 15 percent, Buttigieg is the top second choice at 22 percent, followed by Sanders at 21 percent. This statistic could be an important factor should several low-polling candidates drop out before the caucuses.

One-third of voters said they’re primarily looking for someone who can defeat President Trump Donald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE. Those voters view Biden, Buttigieg and Warren as likeliest to win in a head-to-head matchup against the president.

"For Iowa caucus-goers checking the electability box as their top quality in choosing a candidate, there is no one candidate with a clear edge," said Snow. "Biden, Warren and Buttigieg are tied among those ranking a 2020 win uppermost in their decision."

Health care is the top issue for likely Democrats in Iowa, with 26 percent saying Sanders is strongest on the issue, and 22 percent saying Warren.

Among those who said they backed Sanders in the caucuses in 2016, 35 percent are still with him, but 23 percent now support Warren and 19 percent support Buttigieg. Among those who backed Hillary Clinton Hillary Diane Rodham ClintonBloomberg rolls out M ad buy to boost Biden in Florida Hillicon Valley: Productivity, fatigue, cybersecurity emerge as top concerns amid pandemic | Facebook critics launch alternative oversight board | Google to temporarily bar election ads after polls close Trump pledges to make Juneteenth a federal holiday, designate KKK a terrorist group in pitch to Black voters MORE in 2016, 27 percent now support Biden, followed by 21 percent for Buttigieg and 18 percent for Warren.



The Quinnipiac University survey of 698 likely Iowa Democratic caucusgoers was conducted between Oct. 30 and Nov. 5 and has a 4.5 percentage point margin of error.