Every southern Democrat, those who supported segregation, voted against the 1964 Civil Rights bill and Strom Thrumond left the party. The only southern Democrat who supported it was Ralph Yarborough of Texas who supported all civil rights bills from 1957 to 1970 (including the Voting Rights Act of 1965). Sanders isn't a "D". He's an Independent. Try to pay attention. The KKK collapsed by 1870, disappearing for 50 years. The Republicans abandoned Reconstruction in 1876 and are now doing their best to void the 15th Amendment by sending Kansas Secretary of State Kris Kobach around the country to teach Republican officials how to keep blacks and Hispanics (and even students, the poor and women) from voting.