Quinnipiac University conducted a survey of 3678 Iowa registered voters between Feb 16 and Feb 23, 2015. Respondents were contacted by either Cellphone or Landline and instructed by a live operator. The results of this poll were released on Feb 26, 2015.
Results were provided for the only publicly acknowledged question.
Question 4 | PreferenceView Matchup
If the Democratic caucus were being held today, and the candidates were Joe Biden, Hillary Clinton, Martin O'Malley, Bernie Sanders, Elizabeth Warren, and Jim Webb, who would you support? (If undecided) If you had to choose today, would you support Biden, Clinton, O'Malley, Sanders, Warren, or Webb?
This question was presented to 619 likely voters from Iowa who were contacted in some undisclosed fashion. The margin of sampling error is ± 3.9%.
The question wording was provided by Quinnipiac University.