What was the overall goal of Nixon's Southern Strategy?

Hereof, what did the Southern Democrats want?

In the 19th century, Southern Democrats were whites in the South who believed in Jacksonian democracy. In the 1850s they defended slavery in the United States, and promoted its expansion into the West against northern Free Soil opposition.

Subsequently, question is, when did the parties switch? By the late 19th century, as the Democratic and Republican parties became more established, party switching became less frequent.

In respect to this, why did the South switch to Republican?

Democratic dominance of the South originated in the struggle of white Southerners during and after Reconstruction (1865–1877) to reestablish white supremacy and disenfranchise blacks. The U.S. government under the Republican Party had defeated the Confederacy, abolished slavery, and enfranchised blacks.

Where did the Dixiecrats go?

The Dixiecrats carried Louisiana, Mississippi, Alabama, and South Carolina, and received one additional electoral vote in Tennessee (colored in orange).