Buttigieg closes on Biden, Warren in Iowa: poll

Democratic presidential candidate Pete ButtigiegPeter (Pete) Paul ButtigiegWarren 'fully committed' to 'Medicare for All' New poll shows four top-tier 2020 candidates in Iowa The Democratic race for president may not sort itself out MORE now stands at third place in Iowa, according to a new poll, closely trailing former Vice President Joe BidenJoe BidenSondland notified Trump officials of investigation push ahead of Ukraine call: report Biden says he won't legalize marijuana because it may be a 'gateway drug' Impeachment hearings don't move needle with Senate GOP MORE and Sen. Elizabeth WarrenElizabeth Ann WarrenBiden says he won't legalize marijuana because it may be a 'gateway drug' Democrats seize on report of FedEx's Elizabeth Warren tax bill to slam Trump's tax plan Warren 'fully committed' to 'Medicare for All' MORE (D-Mass.) in the early caucus state.

Buttigieg, mayor of South Bend, Ind., has the support of 13 percent of 500 likely Democratic caucusgoers, based on a Suffolk University/USA Today poll released Monday. 

That places him just behind Biden and Warren, who are in a dead heat for first place at 18 percent and 17 percent, respectively.

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The poll also found that Buttigieg holds a narrow lead over Warren and Biden among debate-watchers, with 19 percent support compared to 17 percent for each of them. 

The new poll shows a big jump for Buttigieg, who was polling at just 6 percent among likely caucusgoers in a June poll. Warren also shot up 4 points from 13 percent since June. 

Biden, who led the field at 24 percent in June, dipped 6 points as other Democrats closed in on his lead. 

Sen. Bernie SandersBernie SandersBiden says he won't legalize marijuana because it may be a 'gateway drug' Democrats seize on report of FedEx's Bernie Sanders tax bill to slam Trump's tax plan If we want to save earth, we need to change how we eat MORE (I-Vt.) is holding steady at 9 percent, the same support he had in June. 

Sen. Kamala HarrisKamala Devi HarrisIf we want to save earth, we need to change how we eat New poll shows four top-tier 2020 candidates in Iowa The Democratic race for president may not sort itself out MORE (D-Calif.), who had shot up to second place in June after a strong performance in the second primary debate, dropped 13 percentage points and is now in a three-way tie for sixth place. 

Harris is tied at 3 percent with billionaire philanthropist Tom SteyerThomas (Tom) Fahr SteyerSteyer: I don't think it's possible to buy the presidency New poll catapults Buttigieg to frontrunner position in Iowa Deval Patrick: a short runway, but potential to get airborne MORE, who was in his first debate of the primary last week, Rep. Tulsi GabbardTulsi GabbardNew poll catapults Buttigieg to frontrunner position in Iowa Deval Patrick: a short runway, but potential to get airborne Saagar Enjeti: Yang's plan to regulate big tech misses the mark MORE (D-Hawaii) and Sen. Amy KlobucharAmy Jean Klobuchar New poll shows four top-tier 2020 candidates in Iowa New poll catapults Buttigieg to frontrunner position in Iowa Election 2020: Why I'm watching Amy and Andy MORE (D-Minn.). 

The poll was conducted after last week's debate, Oct. 16-18. There is a margin of error of 4.4 percentage points. 

The Hill has reached out to pollsters for information on methodology, including what factors were weighted for in the survey results.