The Dixiecrats are the Southern Dems who walked out of the 1948 Democratic Convention because they opposed President Harry Truman's civil rights proposals. I believe a guy names Strom Thurman was a leader of this group. Strom certainly made his bones as a Republican Con as opposed to being a Democrat. Typical of Southern pols of the time...Strom was a Dem so he could get elected to public office. Be he a Dem or a Repubber, Strom was a pretty strong pol who supported Jim Crowe and its way of life. He had a child with his hired (black) help, I believe. Strom became a man of Power in the US Senate.....not because of his politics but because of his longevity. He was an old poop.
Current translation of political philosophy, the old time Dems (Long, Thurman (til 1964), Fulbright, Eastland, Stennis, Richard Russell, Sparkman all moved to the right on social issues and many of these guys became Republicand after Civil Rights and Voting Rights legislation became the law of the land. Many northern senators...Javitz, Hickenlooper, Dirksen were more socially liberal and supported this legislation and remained GOPers for life.