Marist Institute for Public Opinion conducted a survey of 1042 Iowa adults between Jul 14 and Jul 21, 2015. Respondents were contacted by either Cellphone or Landline and instructed by a live operator. The results of this poll were released on Jul 26, 2015.
The poll was sponsored by NBC News.
Results were provided for the only publicly acknowledged question.
Question 4 | PreferenceView Matchup
If the 2016 Democratic presidential caucus in Iowa were held today,
whom would you support if the candidates are (including those who
are undecided yet leaning toward a candidate):
This question was presented to 320 registered voters from Iowa who were contacted in some undisclosed fashion. The margin of sampling error is ± 5.5%.
The question wording was provided by Marist Institute for Public Opinion and NBC News.