1948 and 1968

[Lincoln Republican]

1948
These 4 states would have gone for Truman.
In 1948, the Democratic "Solid South" was not about to go for a Republican.

1968
These 5 states would have gone for Nixon.
These states would not have gone for the very liberal Humphrey.  As well, they would have liked Nixon's "law and order" stand in 1968.
 

[Lincoln Republican]

How do you think the Wallace vote would have split nationally had he not been in the race?

The Wallace vote would have split roughly 70% Nixon, 30% Humphrey.