Public Policy Polling conducted a survey of 1668 Iowa registered voters between Oct 30 and Nov 1, 2015. Respondents were contacted by and the interaction was automated. The results of this poll were released on Nov 2, 2015.

Results were provided for each of the 3 publicly acknowledged questions along with the order in which they were presented.

Question 3 | PreferenceView Matchup

Given the choices of Hillary Clinton, Lawrence Lessig, Martin O’Malley, and Bernie Sanders who would you most like to see as the Democratic candidate for President in 2016?

This question was presented to 618 registered voters from Iowa who were contacted in some undisclosed fashion. The margin of sampling error is ± 3.9%.

The question wording was provided by Public Policy Polling.

Question 32 | PreferenceView Matchup

If the candidates for President next time were Democrat Hillary Clinton and Republican Donald Trump, who would you vote for?

This question was presented to 1668 registered voters from Iowa who were contacted in some undisclosed fashion. The margin of sampling error is ± 2.4%.

The question wording was provided by Public Policy Polling.

Question 33 | PreferenceView Matchup

If the candidates for President next time were Democrat Bernie Sanders and Republican Donald Trump, who would you vote for?

This question was presented to 1668 registered voters from Iowa who were contacted in some undisclosed fashion. The margin of sampling error is ± 2.4%.

The question wording was provided by Public Policy Polling.