Who Supports Trump?
By 
Racists. Racists support Trump.
Moving from the least to the most resentful view of African Americans increases support for Trump by 44 points, those who think Obama is a Muslim (54 percent of all Republicans) are 24 points more favorable to Trump, and those who think the word “violent” describes Muslims extremely well are about 13 points more pro-Trump than those who think it doesn’t describe them well at all.
…
Like Klinkner, my colleagues Max Ehrenfreund and Scott Clement found that Trump received a plurality of support — 43 percent — from respondents who expressed racial resentment. But they also found that economic anxiety played a significant role: 40 percent of respondents who said they were struggling gave their support to Trump, far more than any other candidate.
“Those who voiced concerns about white status appeared to be even more likely to support Trump than those who said they were struggling economically,” Clement and Ehrenfreund wrote, “but the results did not clearly show which concern was more important among Trump’s coalition.
…
The biggest predictor of Trump support among Republican and Republican-leaning voters was a belief that “the growing number of newcomers from other countries threatens U.S. values.” Republicans holding this belief felt 18 points more positively toward Trump, on a 100-point scale, than Republicans who didn’t feel this way.
Belief that Islam encourages violence, and that it’s “bad” for the country that blacks, Latinos and Asians will someday make up the majority of the population, accounted for eight-point jumps in positive feelings toward Trump.