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Sanders leads in Iowa ahead of caucus: poll

Sen. Bernie SandersBernie SandersThe Hill's 12:30 Report: Next steps in the Trump impeachment Sanders selling sweatshirts with his famous inauguration pose for charity Former Sanders spokesperson: Biden 'backing away' from 'populist offerings' MORE (I-Vt.) remains the top choice for Iowa Democrats a day before voters head to caucuses across the state, according to a new poll.

An Emerson College poll released Sunday night found Sanders leading the field with the support of 28 percent of respondents, while former Vice President Joe BidenJoe BidenMcCarthy says he told Rep. Marjorie Taylor Greene he disagreed with her impeachment articles against Biden Biden, Trudeau agree to meet next month Fauci infuriated by threats to family MORE remained in second place with 21 percent, unchanged from the same poll a week ago.

Sanders saw his support dip slightly from 30 percent in last week's poll. Sen. Elizabeth WarrenElizabeth WarrenOVERNIGHT ENERGY: Biden's Interior Department temporarily blocks new drilling on public lands | Group of GOP senators seeks to block Biden moves on Paris, Keystone | Judge grants preliminary approval for 0M Flint water crisis settlement Senate approves waiver for Biden's Pentagon nominee House approves waiver for Biden's Pentagon nominee MORE (D-Mass.) has gained 3 percentage points since the previous survey. She remains in fourth place in Saturday's poll after previously falling behind Sen. Amy KlobucharAmy KlobucharDemocrats seek answers on impact of Russian cyberattack on Justice Department, Courts A Day in Photos: The Biden Inauguration Senators vet Buttigieg to run Transportation Department MORE (D-Minn.) last week.

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Klobuchar, meanwhile, saw her support drop 2 points over the week, while former South Bend, Ind., Mayor Pete ButtigiegPete ButtigiegThe Hill's Morning Report - Biden's crisis agenda hits headwinds Biden signs order to require masks on planes and public transportation Senators vet Buttigieg to run Transportation Department MORE (D) surged 5 points to take third place in the poll.

Businessman Andrew YangAndrew YangYang to quarantine after campaign staffer tests positive for COVID-19 Andrew Yang sparks Twitter uproar with pro-bodega video Yang announces run for New York City mayor MORE and billionaire Tom SteyerTom SteyerOn The Trail: The political losers of 2020 Biden Cabinet picks largely unify Democrats — so far Late donor surges push election spending projections to new heights MORE registered support from 5 percent and 4 percent of voters, respectively, while no other candidates polled higher than 1 percent.

The survey was taken between Jan. 30 and Feb. 2 and polled 853 likely Democratic caucusgoers in the state. The margin of error is 3.3 percentage points.