Is Hagan ahead?
Polls testing potential head-to-head contests pitting incumbent Democratic U.S. Sen. Kay Hagan against would-be GOP contenders are hard to interpret this early in the race.
Posted — UpdatedSuch is the case with a recent survey about the North Carolina U.S. Senate race.
The real problem is that none of these headlines is accurate.
There is no Republican nominee yet – the primary is May 6 – and voters are not paying close attention to the race.
Polls are volatile and non-predictive in these circumstances. Unfortunately, most polling firms tend to manufacture the illusion of settled opinions. They do this by:
- Not providing respondents with an explicit answer option of "undecided”
- Asking respondents who initially say they are undecided to please choose someone
- Allocating a portion of undecided respondents to each candidate based on some decision rule
That is why the Rasmussen poll in January reported just 10 percent of respondents were undecided. How then did AI find 27 percent are undecided in the race? The answer is, to AI’s credit, the firm did not push people to answer a question in which they had no real opinion.
Of course, some people do know how they will vote in November, but since the lead for any candidate is always within the margin of error, none of these polls can actually be used to distinguish which candidate is ahead.
For the AI poll, this error is plus or minus 4 percentage points, meaning each candidate’s true level of support could be anywhere between 4 points more or less than was actually measured in that poll. So Hagan’s support is anywhere between 34 and 42 percent, and Tillis’ is between 31 and 39 percent. Since the possible range of each candidate’s level of support overlaps with each other –Tillis could be "up" 38 to 36 percent – it is impossible to distinguish whether any candidate is truly ahead. This is what pollsters commonly call, "a dead heat."
A final observation: It would be a mistake to rely on a single poll to judge a race. In the case of AI, it lacks a track record and uses a combination of Internet, cellphone and landline modes of administering surveys, which is a promising but largely uncharted approach.
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