Research note for Swing 6 survey fields

Surverys were fielding from sample driven to surveys programmed in either Qualtics or Alchemer

In narly all cases, national and individual states were surveyed separately. However, sample collected for the national survey from Arizona, Georgia, Michigan, Nevada, Pennsylvania, and Wisconsin were imported into the individual state samples for each of the six states.

As a consequence, the datasets for the national and swing six states cannot be combined without accounting for the overlap between the two.