Only Southern State he didn't carry that year.
Also, did Governor Ronald Reagan lose the primary to George H W Bush in Michigan in 1980 because he primaried President Gerald Ford in 1976?
Someone is probably much more knowledgeable than I am on this, but the Southern states that seemed to accept conservatism the fastest in the mid-Twentieth Century were Florida, Virginia, Oklahoma, Texas, Mississippi and South Carolina. Oklahoma and Texas seem tied to being A) more Western, B) more pro-business in general with oil and C) have a lot of Northern transplants. Mississippi and South Carolina were, likely, serious backlash to national Democrats courting the Black vote more aggressively. If I were to GUESS RE: Virginia and Florida, I would say they had the most "fiscally conservative" Northern retirees? At least I would imagine that to be the case in Florida. Virginia's suburbs (NOVA) were relatively young/growing then, so they were probably much more conservative than they are today, too.