The Harris Poll conducts the Harvard CAPS / Harris Poll online in the US, gathering the opinions of more than 2,000 registered voters. The outcomes represent a sample that is nationally representative. When necessary, the results were adjusted for age within gender, region, race/ethnicity, marital status, family size, income, employment, and education to match their actual proportions in the population. In order to account for respondents' inclination to be online, propensity score weighting was also applied.