Interesting how the results of 1976 profoundly affect us to this day...for example, if Carter loses to Ford (or if Reagan loses to Carter) there is never any Pres. Reagan, then there is never any Pres. GHW Bush, and thus obviously no Pres. GW Bush.
Interesting theory, though you never know, given that Bush was the only genuine challenger to Reagan in the 1980 primaries. As far as I'm aware he was already a fairly big player within the Republican Party, so we might have seen President George HW Bush at some stage, regardless of him being Reagan's running mate or not. But that's pure speculation, of course. (But then so was my original post which started this thread... ah, diddums.)
Also, thanks Ryan for some insight on how the political demographics of the South changed in the course of the 1970s. I was totally unaware of some of the facts you presented, thanks.