Leftists have a mythical theory of a 'big switch'. As the tale goes, all the racist confederate types of the old south suddenly switched from he Rat party to the GOP, circa 1965.
A cynic might point out that the racist democrats, having lost the civil rights battle and faced with the prospect of a large black voting block in the south, merely switched their stance, and not their party, to pander to the new voters.
