Poll: Sanders leads Biden by 9 points in Iowa

Poll: Sanders leads Biden by 9 points in Iowa
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Sen. Bernie SandersBernie SandersRussian interference reports rock Capitol Hill The Democratic nominee won't be democratically chosen Fox's Ingraham mocks DNC over Nevada voting malfunctions: 'Are we a Third World country?' MORE (I-Vt.) holds a commanding lead over the Democratic field in Iowa just days before the state is set to hold its first-in-the-nation caucuses, according to a new poll.

An Emerson College poll released Sunday evening of registered Democrats and left-leaning independents found Sanders in the lead with 30 percent of respondents planning to support him in the caucuses, while former Vice President Joe BidenJoe BidenThe Democratic nominee won't be democratically chosen Fox's Ingraham mocks DNC over Nevada voting malfunctions: 'Are we a Third World country?' At Democratic debate, missed opportunities on immigration MORE (D) followed with 21 percent.

Sen. Elizabeth WarrenElizabeth Ann WarrenThe Democratic nominee won't be democratically chosen Surging Sanders looks for decisive win in Nevada Bloomberg to do interview with Al Sharpton MORE (D-Mass.) has sunk to fourth place in the poll behind Sen. Amy KlobucharAmy Jean KlobucharThe Democratic nominee won't be democratically chosen At Democratic debate, missed opportunities on immigration Surging Sanders looks for decisive win in Nevada MORE (D-Minn.) at 11 percent and 13 percent, respectively, while former South Bend, Ind., Mayor Pete ButtigiegPeter (Pete) Paul ButtigiegThe Democratic nominee won't be democratically chosen At Democratic debate, missed opportunities on immigration Surging Sanders looks for decisive win in Nevada MORE rounded out the top tier in fifth place with 10 percent.

No other candidate registered above 5 percent support in the poll. Sanders's dominance in the poll comes after a USA Today/Suffolk University poll released earlier in the day showed Biden with a slight lead over Sanders in the state.

The Emerson College poll surveyed 450 Democrats and independents in Iowa via landlines and online polling, and has a margin of error of 4.6 percentage points.