Correction respectfully Q HALL, I don't think Mr. Trump is a racist today, no more than Muhammed Ali who advocated racial separation early in his life was in his later years, no more than Elderidge Cleaver was as a Black Activist who later joined the Mormon Church after spending his youth boasting about rape of white women, even George Wallace who you pointed out apologize in his later years. When You bring up the 1960's, again it was a very different era, racism was to be both Black and White people, just as we are now seeing today. 
Mr. Trump never endorsed David Duke, many who were racists supported Mr. Trump, Mr. Trump made quite clear he rebuked them. One can't stop people from supporting them, but unlike the historical Democratic Party, which was the party of the KKK, the one that vigorously fought to preserve slavery in America, if you respectfully wish to "deflect" to history to validate you point, please include all of that history!