Quinnipiac University conducted a survey of 2833 Iowa registered voters between Oct 14 and Oct 20, 2015. Respondents were contacted by either Cellphone or Landline and instructed by a live operator. The results of this poll were released on Oct 23, 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
Lincoln Chafee, Hillary Clinton, Larry Lessig, Martin O'Malley, and Bernie Sanders, who
would you support? (If undecided) If you had to choose today, would you support Chafee,
Clinton, Lessig, O’Malley, or Sanders?
This question was presented to 592 likely voters from Iowa who were contacted in some undisclosed fashion. The margin of sampling error is ± 4%.
The question wording was provided by Quinnipiac University.