NBC-WSJ-Marist released the results of a new poll, in which respondents from Illinois were asked for whom they will vote: Hillary Clinton or Donald Trump.
NBC-WSJ-Marist poll results
Of those who replied, 57.0% said that they intend to vote for former First Lady Hillary Clinton, whereas 32.0% indicated that they would give their vote to real estate developer Donald Trump.
The poll was in the field between March 4 and March 10. The sample size was 1968 registered voters.
Putting the results in context
As a general rule, however, don't have too much faith in the results of single polls, as they can incorporate large errors. Instead of relying on results from single polls, the best practice is to use combined polls or, even better, the combined PollyVote forecast that draws upon different methods and data.
In order to make the results comparable to forecasts from other methods, one can convert them into shares of the two-party vote. This yields figures of 64.0% for Clinton and 36.0% for Trump.
Results compared to the combined PollyVote prediction
The latest PollyVote foresees Clinton to gain 58.4% of the two-party vote in Illinois. That is, Polly's prediction is 5.6 points below her polling numbers.