Not sure you can really stop either but if you put speed barriers on the Big Bang of 1986 and integration with the world economy you can slow the growth.
How about if you kept some capitals at the expense of other cities? If Houston was kept the capital of Texas, the metro area would likely be the size of Chicago. Charleston could easily be double the size it is now if Columbia wasn't designated the state capital, Knoxville could have taken much...
I think the key is, with an early 20th century POD, would it be impossible to dislodge the organized working-class from the Democratic Party and align them with the GOP? The ultimate reason this did not happen is what business coalitions did shake out within the Democrats and Republicans, as...
Per Sam R., I don't really know how you avoid constant "scissor crisis"-type issues cropping up (which they were doing so again at the eve of the Ural-Siberian method).
I am not sure who conservatives would back or if Goldwater would be guaranteed to run (he was reluctant to anyway a few years later). Maybe Dirksen? A plausible VP choice for Rockefeller when I think of it. Robert B. Anderson seems more like one of Ike's flights of fancy that would get tamped...
Could LBJ retain his power remaining in the Senate? It's been floated before his power would have waned if he did not ascend to VP and the Presidency. Getting squeezed between the new crop of liberal Senators who distrusted him and segregationists + not having the power of the executive...
I think this sounds right -- lot of ideological overlaps with JFK. Other good questions: how much does Rocky lose in the Upper South vis-a-vis Nixon? How much does he gain in the Midwest/Northeast?