With the last, wouldn't Goldwater's loss interrupt this process? Without Nixon, they have no way except Reagan(who may be in the Goldwater camp) else to nominate.
This.
Besides the McCarthy era Red Butterflies, Eisenhower's VP (likely Knowland) in '60 is going to loose to JFK. So the real problem arises in '68. Who will be President?
The Southern Strategy is a metatrend that Nixon didn't invent; he took advantage of it. Various peoples noticed the fracturing of the 'solid south' due to the Civil Rights issue. Reagan was one of the first people IOTL that Nixon noticed successfully using the 'subtle race card' (welfare, etc.) to do something Nixon himself failed to do - become Gov. of California.
So, the groundwork had been established in '64 by the Goldwater conservative faction. Some 75% of delegates at '68 RNC labeled themselves as 'conservatives.' Come '68 we are going to have the same players as IOTL. Rockefeller, Romney, and Reagan are all going to make a play for it.
Romney will likely go down the way he did IOTL. Either that or split the liberal vote with Rocky. Rocky will be far and away the establishment/media choice. Question is... who does Sen. Thurmond want? Reagan, that's who. Southern vote plus California and Goldwater's Arizona, Reagan is starting at around 380 delegates
at least. With 75% of the delegates reporting as conservative, and with no other option around, Miami Beachis Reagan's party.
Using
extreme butterfly nets, Reagan beats Humphrey in '68.