Amazing timeline, keep it coming. I have a feeling that the 1976 election will be popular with alternate historians of TTL. Carter's loss will be seen as a fumble for the ages and most people will assume that he easily would have won if not for his Playboy interview. I imagine on whatever equivalent of AH.com exists there are quite a few timelines where Carter sans interview (or a different Democrat) trounces Ford only to get slammed by the crises of the late 70s and lose to Reagan in 1980.
Fun fact, Carey/Askew was also the 1980 Democratic ticket in Fear, Loathing, and Gumbo. Luckily he's turned out much better here