Why had many democratic voters in the south become potential republican supporters by 1968?

Southern Democrats were emphatically pro-segregation, though the Democratic party in the north turned into a supporter of social liberties. All things considered, the southern Democrats turned out to be increasingly irritated from the Democratic party all in all, and accordingly more prone to change faithfulness to the Republicans, who had a more direct position on this, to southern Democrats vital, issue. At the end of the day, they were miserable with the Democratic administration's integration strategies, and also the liberal leanings of the Supreme Court.