Racism motivated Trump voters more than authoritarianism

The following article by Thomas Wood was posted on the Washington Post website April 17, 2017:

A voter casts a ballot in Georgetown, Wis., on Nov. 8, 2016. (Nicki Kohl/Telegraph Herald via AP)

During the 2016 presidential campaign, many observers wondered exactly what motivated voters most: Was it income? Authoritarianism? Racial attitudes?

Let the analyses begin. Last week, the widely respected 2016 American National Election Study was released, sending political scientists into a flurry of data modeling and chart making.

The ANES has been conducted since 1948, at first through in-person surveys, and now also online, with about 1,200 nationally representative respondents answering some questions for about 80 minutes. This incredibly rich, publicly funded data source allows us to put elections into historical perspective, examining how much each factor affected the vote in 2016 compared with other recent elections.

Below, I’ll examine three narratives that became widely accepted about the 2016 election and see how they stack up against the ANES data.

The rich, the poor, and the in-between

The first narrative was about how income affected vote choice. Trump was said to be unusually appealing to low-income voters, especially in the Midwest, compared with recent Republican presidential nominees. True or false?

The ANES provides us data on income and presidential vote choice going back to 1948. To remove the effects of inflation and rising prosperity, I plot the percentage voting for the Republican presidential candidate relative to the overall sample, by where they rank in U.S. income, from the top to the bottom fifth. The dashed horizontal line shows the average likelihood of voting for the GOP presidential candidate that year; a point above that means an income cohort was more likely than the other groups to vote for the Republican. To most directly test the Donald Trump income hypothesis, I’ve restricted this analysis to white voters.