Warren holds slim lead over Sanders in Iowa, Biden in fourth: poll

A new poll shows a tight race in Iowa, with Sen. Elizabeth WarrenElizabeth WarrenWarren slams Trump over Proud Boys comments Ocasio-Cortez, Warren pull out of New Yorker Festival amid labor dispute The Hill's Morning Report - Fight night: Trump, Biden hurl insults in nasty debate MORE (D-Mass.) leading the early voting state and former Vice President Joe BidenJoe BidenPrivacy, civil rights groups demand transparency from Amazon on election data breaches Facebook takes down Trump campaign ads tying refugees to coronavirus Trump crowd chants 'lock her up' about Omar as president warns of refugees in Minnesota MORE slipping to fourth.

The New York Times–Siena College poll released Friday showed Warren with 22 percent support from likely Democratic caucusgoers, Sen. Bernie SandersBernie SandersDemocrats say Biden survived brutal debate — and that's enough The Hill's Morning Report - Fight night: Trump, Biden hurl insults in nasty debate Trump, Biden clash over health care as debate begins MORE (I-Vt.) with 19 percent, South Bend, Ind., Mayor Pete ButtigiegPete ButtigiegCindy McCain joins board of Biden's presidential transition team Billionaire 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 MORE (D) with 18 percent and Biden with 17 percent. All four fall close to the poll's margin of error of plus or minus 4.7 percentage points.

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No other candidate was near the top four, who were distantly trailed by Sen. Amy KlobucharAmy 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.) with 4 percent, Sen. Kamala HarrisKamala HarrisDebate commission adding option to cut candidates' mics: report Debates panel says changes under consideration 'to ensure a more orderly discussion' The Hill's 12:30 Report - Sponsored by The Air Line Pilots Association - Country reacts to debate night of mudslinging MORE (D-Calif.) with 3 percent and entrepreneur Andrew YangAndrew YangThe shape of guaranteed income Biden's latest small business outreach is just ... awful Doctor who allegedly assaulted Evelyn Yang arrested on federal charges MORE with 3 percent.

The survey is among a series of recent polls showing Warren leading the field in Iowa. A RealClearPolitics average of polls showed the senator ahead of the former vice president by an average of 5 percentage points Friday morning. 

Buttigieg's rise in the poll puts him much closer to the front-runners in Iowa than in national polls. He is in fourth place in the nationwide RealClearPolitics average of polls, trailing Sanders by 9 points.

Biden said in an MSNBC interview this week that he plans to do “very well” in Iowa and New Hampshire amid questions as to whether he can win the early caucus and primary states. 

“I plan on doing very well in both those," he said Tuesday. "I’ve been ahead in Iowa. I’ve been ahead in South Carolina. I’m ahead in all the national polls with the occasional one that pops up that’s different."

Researchers surveyed 439 likely Iowa Democratic caucusgoers from Oct. 25 to 30.

The Iowa caucuses are just more than three months away, taking place on Feb. 3.

More than a dozen people are vying for the 2020 Democratic presidential nomination.

Updated at 9:08 a.m.