Those numbers have been fueled by Trump's repeated false claims that President Obama wasn't born in the U.S. (he was the most prominent cheerleader of the racist so-called "birther movement"), his attacks against a U.S.-born judge of Mexican heritage, his repeated retweets of white nationalists, his delay in disavowing Duke and the KKK, his false claim that thousands of Muslims in New Jersey cheered the 9/11 attacks, his promises to ban Muslims from entering the U.S. and kick out all undocumented immigrants, and numerous other examples.