How does zero-sum thinking shape voting behavior among Democrats?
Core argument: Democrats in the top quartile of zero-sum thinking, both moderate and strong, voted for Donald Trump at a disproportionately high rate.
Our baseline measure of zero-sum thinking is based on four questions about the extent to which respondents believe that relationships in different domains are zero-sum: 1. 'If one ethnic group becomes richer, this generally comes at the expense of other groups in the country.' 2. 'If those without American citizenship do better economically, this will generally come at the expense of American citizens.' 3. 'In international trade, if one country makes more money, then it is generally the case that the other country makes less money.' 4. 'If one group becomes wealthier, it is usually the case that this comes at the expense of other groups.' We create an index ranging from 0 to 1, summarizing the degree to which respondents perceive the world in zero-sum terms, using the estimated factor loadings from the first principal component of these four questions, which are positive and of similar magnitude across all four domains. Figure 9 shows that those in the top quartile of zero-sum thinking among both moderate and strong Democrats voted for Donald Trump at a disproportionately high rate. In general, Donald Trump’s rhetoric was very zero-sum: emphasizing situations in which individuals or groups are pitted against each other in a (supposedly) zero-sum setting, such as immigrants versus domestic-born people, Muslims versus Christians, China versus the United States, and the anti-establishment versus the Washington elite.





