Quinnipiac University conducted a survey of 832 Iowa likely voters between Aug 27 and Sep 8, 2015. Respondents were contacted by either Cellphone or Landline and instructed by a live operator. The results of this poll were released on Sep 10, 2015.
Results were provided for the only publicly acknowledged question.
Question 3 | PreferenceView Matchup
If the Democratic caucus were being held today, and the candidates were Joe Biden,
Lincoln Chafee, Hillary Clinton, Martin O'Malley, Bernie Sanders, and Jim Webb, who would
you support? (If undecided) If you had to choose today, would you support Biden, Chafee,
Clinton, O’Malley, Sanders, or Webb?
This question was presented to 832 likely voters from Iowa who were contacted in some undisclosed fashion. The margin of sampling error is ± 3.4%.
The question wording was provided by Quinnipiac University.