I really liked this version. Hillary would still be a Goldwater Girl if Bill hadn't shown her the light. The only things I was wondering about is what happened to Jimmy Carter, since all the other real life Presidents except GW and Ford were mentioned here. Jerry Brown kind of came out of nowhere, I'm not sure how much of an influence he ever could have been.
And unless I'm mistaken, Johnson would have done well in 1964, since he would've still had the Solid South (not sure if the Civil Rights Act was included in your scenario) and he was doing a good enough job that many normally Republican North/Midwesterners still would have supported him.
Having George McGovern as President...........priceless