A must watch video even a must have in ones library.
American History in Black & White - David Barton (Part 1)
Understanding is that the constitution is an anti- slavery document once one understands the 3/5 clause which is explain on this video also about 10 mins. into the talk tell how around 1820 the Democratic party turn racists.
http://www.youtube.com/watch?v=REl-99K-8tk
American History in Black & White (2_12).mp4
http://www.youtube.com/watch?v=m8LKQXodEkQ&NR=1
Now was it not the mainstream who had to support this or it would not have been continues to be voted in an acceptanced.
KKK Democrats Lynching Killing Black & White ‘Radical Republicans’
http://www.youtube.com/watch?v=8bEOiDjdhF4&NR=1