Quinnipiac University conducted a survey of 727 Iowa likely voters between Dec 4 and Dec 13, 2015. Respondents were contacted by either Cellphone or Landline and instructed by a live operator. The results of this poll were released on Dec 15, 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
Hillary Clinton, Martin O'Malley, and Bernie Sanders, who would you support? (If
undecided) If you had to choose today, would you support Clinton, O’Malley, or Sanders?
This question was presented to 727 likely voters from Iowa who were contacted in some undisclosed fashion. The margin of sampling error is ± 3.6%.
The question wording was provided by Quinnipiac University.