Mid-term Electoral Survey: 6th District of Illinois, Roskam vs Casten



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Where we will call:

Choice of vote: Dem. representative Do not know Did not answer

Explore the 2016 elections in detail with this interactive map.

About the race

  • Sean Casten is a scientist and a businessman of clean energy.

  • Peter Roskam is the current representative and a former lawyer. He voted for the tax reform bill and to repeal and replace the Affordable Care Act.

  • The Sixth of Illinois is emblematic of a type of district that might decide to take control of the House: a well-educated suburb who voted for Hillary Clinton but who usually has a Republican vote and a strong power against a newcomer policy.

  • (We interviewed this district from September 4 to 6 and found a close race.)

  • This district, in the western suburbs of Chicago, has a median income of nearly $ 100,000.

  • Mr. Roskam won by 18 points in 2016 and started the summer with a four-fold cash advance, a major advantage in an expensive media market. But Mr. Casten has significantly narrowed the gap.

Ratings of other organizations:

Results of previous elections:

President 2016 +7 Clinton
President 2012 +8 Romney
House 2016 +18 Rep.

It is generally preferable to examine a single survey in the context of other surveys:

Our participation model

An important question is added to the standard margin of error of a poll: who will vote? This is a particularly difficult issue this year, as special elections have shown that Democrats voted in large numbers.

To estimate the likely electorate, we combine what people say about their likelihood of voting with information about the frequency with which they voted in the past. In previous races, this approach was more accurate than simply taking people to the word. But there are many other ways to do it.

Once we have spoken to 150 constituents, we will show you the results of our survey based on several participation scenarios.

Our survey under different participation scenarios
Who will vote? Is. s & # 39; be Our poll result
Our estimate
People who are almost certain to vote, and no one else
People whose voting history suggests voting no matter what they say
People who say that they will vote, adjusted for past levels of truth
Every active registered voter
The types of people who voted in 2014
The types of people who voted in 2016

The types of people we have reached so far

Even if the participation rate was correct, the margin of error would not capture all the errors of a survey. The simplest version assumes we have a perfect random sample of the voting population. We dont do.

Respondents are almost always too old, too white, too educated and too politically committed to accurately represent everyone.

How did we manage to reach different types of voters
18 to 29
30 to 64
65 and over
Male
Female
White
Not white
Cell
Landline

Pollsters compensate by giving more weight to underrepresented groups. Once we have talked to more voters, we will show you other common ways of weighting a poll.

Our survey under different weighting systems
Our poll result
Our estimate
Do not weight through education, as in many polls in 2016
Do not be weighted by the main vote, as most public polls
Weight using census data instead of voting records, as in most public polls

Undecided voters

We still do not have enough undecided voters to say a lot about that.

Problems and other issues

Do you approve or disapprove of Donald Trump's work as president?
Approve Disapp. Do not know
The electors
Would you prefer Republicans to retain control of the House of Representatives or do you prefer Democrats to take control?
Reps. Keep the house Dems. take the house Do not know
The electors

What types of voters said

Voters in the country are deeply divided according to demographic criteria. But do not overinterpret these tables. Results among subgroups may not be representative or reliable.

Sex
Dem. representative Und.
Female
Male
Age
Dem. representative Und.
18 to 29
30 to 44
45 to 64
65 and over
Race
Dem. representative Und.
White
Not white
Race and education
Dem. representative Und.
Not white
White, graduate
White, not a student
Education
Dem. representative Und.
H.S. Grad. or less
Some College Educ.
4 years university graduate.
Post-grad.
Party
Dem. representative Und.
democrat
Republican
Independent
Another party
Primary vote
Dem. representative Und.
Democratic
Republican
Other
Intention to vote
Dem. representative Und.
Almost certain
Very probable
Rather likely
Probably not
Not at all likely
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