Public Policy Polling conducted a survey of 1901 Iowa registered voters between Jan 8 and Jan 10, 2016. Respondents were contacted by either Landline or Internet and the interaction was automated. The results of this poll were released on Jan 12, 2016.

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

Question 4 | PreferenceView Matchup

The Democratic candidates for President are Hillary Clinton, Bernie Sanders, and Martin O’Malley. If the election was today, who would you vote for?

This question was presented to 580 likely voters from Iowa who were contacted in some undisclosed fashion. The margin of sampling error is ± 4.1%.

The question wording was provided by Public Policy Polling.

Question 27 | PreferenceView Matchup

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

This question was presented to 1901 registered voters from Iowa who were contacted in some undisclosed fashion. The margin of sampling error is ± 2.3%.

The question wording was provided by Public Policy Polling.

Question 28 | PreferenceView Matchup

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

This question was presented to 1901 registered voters from Iowa who were contacted in some undisclosed fashion. The margin of sampling error is ± 2.3%.

The question wording was provided by Public Policy Polling.