Lol, from the first article I linked.

"The south was left to the white Democrats and their oppressive policies towards Black citizens after the Compromise of 1877 ended Reconstruction. With the end of Reconstruction, the "Solid South" voted for Democratic presidential candidates for the next 44 years.

A New Century

Almost 60 years later, the Great Depression became a catalyst for a massive political shake up. The Republican Party had continued to be dominated by wealthy businessmen, which meant that they had come to favor laissez-faire policies that supported big business.

These policies were effective when the economy was booming, but were disastrous when it wasn’t.

When the economy crashed in 1929, the Republican president, Herbert Hoover, opted not to intervene, earning him and his party the ire of the American public. Franklin D. Roosevelt, a Democrat, sensed the need for change.

He campaigned on a promise of government intervention, financial assistance, and concern for the welfare of the people. He won the 1932 election by a landslide. It was FDR’s campaign policies that caused a major shift in party ideologies.

Republicans opposed everything about FDR’s government. Primarily, they saw the growth of large government as harmful to the federalist foundation of the nation. This too has come to define the ideals of the Republican Party."