The democratic party's long-time regional stronghold, "the solid south," stemmed from a realignment during which historical period?

The beginning of the "Solid South" for Democrats really starts during the Reconstruction period (the time period right after the Civil War). There were several reasons behind this support of the Democratic party. One of the largest ones was the policies of the Republican president (Abe Lincoln) right before the southern states seceded. Along with this, their priority on individual rights and little government interference resulted in a loyalty that was unmatched during this period.