http://mediamatters.org/blog/2016/06/10/50-times-co-author-trump-s-go-anti-clinton-book-has-tweeted-slur-nigger/210858
"Trump has repeatedly used research from The Clintons’ War on Women, which is co-authored by Robert Morrow -- a bizarre conspiracy theorist who uses his Twitter account to endlessly tweet the slur “ni**er,” including about President Obama."