[AlexanderHowl]

Unlike in our timeline, HRC would have won in 2008, rather than have failed in 2016. It is hardly important though, the divergence is set in 1969, and all of the people who became president in the ATL have already been born, so they have a chance. If we assume that their genetics and their environment play a role in the success, not just blind chance, then they would have the essential inertia by 1977, when Teddy became President (and when the divergence starts to matter for the entire nation).

A more successful Democratic Party would have been in the cards had Teddy not had the scandal and had won 1976. With him being followed by Glenn in 1984, and with Glenn succeeding in overseeing the end of the Cold War and the beginning of energy production from the orbital solar array, the momentum would have only continued. Brown would have been a nature choice due to the progressive momentum from 16 years of Democratic administrations, but I think that he would have dampened some of the appeal with more radical social programs.

McCain would have been a natural choice from there on (without the first Bush presidency, I doubt a second one would have been in the works). Beyond that, moderate Democrats and/or moderate Republicans are a natural fit, as the Southern Strategy of Nixon would have been a mixed success, stengthening the moderate Republican wing. HRC was a Goldwater girl in her youth, so she may have stayed moderate Republican in such a divergence, even if her husband was a Democratic governor, and may have been able to become a Republican President. Obama could be have also been a moderate Republican in such a divergence.