From The Washington Post:
[David] Sears of the University of California [Los Angeles] has found that even among white voters with equally conservative views on issues unrelated to race, those with more negative views about African Americans are more likely to vote Republican. He and Michael Tesler, a political scientist at the University of California, Irvine, showed that there were many racially conservative white voters who supported John Kerry and President Clinton when they were candidates, but who voted against President Obama.
 
For the full story, please visit https://www.washingtonpost.com/news/wonk/wp/2016/03/03/researchers-have-found-strong-evidence-that-racism-helps-the-gop-win/.