The Des Moines Register and Selzer & Company conducted a survey of 800 Iowa adults between Oct 3 and Oct 6, 2016. Respondents were contacted by either Cellphone or Landline and instructed by a live operator. The results of this poll were released on Oct 8, 2016.

Results were provided for the only publicly acknowledged question.

The external identification number for this poll is 2145.

Question 3 | PreferenceView Matchup

(If definitely vote, ask:) If the general election were held today, and the candidates were [Hillary Clinton for the Democrats], [Donald Trump for the Republicans], [Gary Johnson for the Libertarian Party], and [Jill Stein for the Green Party], for whom would you vote? (Rotate candidate names in brackets.) (If already voted, ask:) In the election for president, for whom did you vote—[Hillary Clinton for the Democrats], [Donald Trump for the Republicans], [Gary Johnson for the Libertarian Party], or [Jill Stein for the Green Party]? (Rotate candidate names in brackets.) (If definitely vote and not sure or would not vote, ask:) Toward which do you lean? (If already voted and not sure, ask:) Do you just not want to tell, or do you not remember?

This question was presented to 642 likely voters from Iowa who were contacted in some undisclosed fashion. The margin of sampling error is ± 3.9%.

The question wording was provided by the Des Moines Register and Selzer & Company.