Who were the few R voters in the Deep South until 1944?

[buritobr]

Until 1944, the number of Republican voters in the Deep South was very low, but not zero.

Examples

Teddy 1904
National: 56.42%
Louisiana: 9.66%
Mississippi: 5.59%
Alabama: 20.65%
Georgia: 18.33%
South Carolina: 4.63%

Harding 1920:
National: 60.35%
Louisiana: 30.49%
Mississippi: 14.03%
Alabama: 37.11%
Georgia: 27.63%
South Carolina: 3.91%

Landon 1936
National: 36.54%
Louisiana: 11.16%
Mississippi: 2.75%
Alabama: 12.82%
Georgia: 12.60%
South Carolina: 1.43%

Dewey 1944
National: 45.89%
Louisiana: 19.39%
Mississippi: 6.44%
Alabama: 18.20%
Georgia: 18.25%
South Carolina: 4.46%

Were these voters richer or poorer than the average? Were they more urban or more rural? Were they more liberal or more conservative?

[buritobr]

We can find the county map in the Wikipedia, with diferent shades of red and blue.
Here we can see the map of 1920 (a year in which the Republican vote in the deep south was not very low)
https://en.wikipedia.org/wiki/United_States_presidential_election,_1920#/media/File:1920nationwidecountymapshadedbyvoteshare.svg
In the Wikipedia, R is red and D is blue
The huge majority of the counties in Mississippi and South Carolina are dark blue. In Georgia and Alabama, there are some light blue and light red counties in the North, in Appalachia. The light red counties in Georgia have border with the red counties in East Tennessee.
Harding won also some counties in the south of Louisiana.

In 1928, Smith won the south of Louisiana.