“The final sample is weighted for age, gender, race and partisanship based on voter list and U.S. Census information. Data collection support provided by Braun Research (field), Aristotle (voter list sample), and SSI (RDD sample).
For results based on this sample, one can say with 95% confidence that the error attributable to sampling has a maximum margin of plus or minus 3.5 percentage points (unadjusted for sample design). Sampling error can be larger for sub-groups (see table below).
In addition to sampling error, one should bear in mind that question wording and practical difficulties in conducting surveys can introduce error or bias into the findings of opinion polls. “
Would you place credence on the unweighted saying that more repubs are going to vote this year since they’re willing to take the survey?