It seems likely that the whole process of nomination of Presidential candidates based on primaries will undergo dramatic change in 2024 and after.
It is time to stop Iowa and New Hampshire from having the first contests, as neither state is at all representative of the nation, as both are primarily white, rural, and small in population.
Diversity is needed, and the larger states in population should have a greater impact than smaller states in timing of primaries.
And caucuses, now in very few states, need to be abandoned completely.
Regional primaries makes the most sense, with the five major regions rotating in order of timing, but other states in each region given the opportunity to join the representative states if they choose, or else have their later primaries after the first five weeks of the primary season.
So we would have the Atlantic Coast be represented by Pennsylvania; the South represented by Florida; the Midwest represented by Wisconsin; the Mountain and Plains area represented by Colorado; and the Pacific Coast represented by Washington State in the first five weeks, with other states in each region able to add on if they wish, or else come after the first five weeks of primaries, starting in Mid March of the Presidential election year.