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Another Iowa poll finds Clinton leading with Biden out of the race

Joe Biden's exit from the race launches Hillary Clinton back into the lead over Bernie Sanders in another new Iowa poll - they had been nearly tied in the same poll in September.

Among Iowa likely Democratic caucus participants, a Quinnipiac University poll released Friday morning found Clinton drew 51 percent support, followed by Bernie Sanders, with 40 percent.

A September 10 survey by Quinnipiac had shown them separated by one percentage point - Sanders had 41 percent, compared with Clinton at 40 percent.

Martin O'Malley attracted 4 percent of Iowa likely Democratic caucus participants.

There remains a gender gap among these voters: Sanders leads Clinton 51 - 39 percent among men, while Clinton leads Sanders 59 - 33 percent among women.

Among the 48 percent of Iowa likely Democratic caucus goers who watched or listened to the first Democratic debate last week, 62 percent say Clinton did the best job, followed by 31 percent for Sanders and 3 percent for O'Malley.

From October 14 - 20, Quinnipiac University surveyed 592 likely Iowa Democratic Caucus participants with a margin of error of +/- 4 percentage points. Live interviewers call land lines and cell phones.

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