There is an interesting discussion of the defection of racist Democrats to the Republican party between Richard Viguerie and an associate of George H.W. Bush, who was chairman of the Houston Republican party at the time, in a program on GHW Bush, but the transcript of this excellent program is presently unavailable. These are two conservatives who were there. There have been recent attempts at a revisionist history, which is discussed here:

The Conservative Fantasy History of Civil Rights

http://nymag.com/daily/intelligencer/2012/05/conservative-fantasy-history-of-civil-rights.html

Dinesh D'Sousa lost a lot of credibility when he became a convicted felon for violating election laws.